RANKING · 2000 CENSUS · 500 SHOWN OF 3,122

Most population gained, US counties · 2000

US counties that added the most residents from the 1990 census to 2000, by raw count of people rather than percentage. Maricopa County, Arizona leads at +950,048. 3,122 counties qualify in total. California carries 7 of the top 25 entries. The median across all 3,122 is +1,764.

Flip the list · Most population lost, US counties →

All statesAll rankings

SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS –

USUnited States281,421,906+1,534,999–

01Maricopa County, AZAZ4,689,558+950,048–

02Los Angeles County, CACA9,694,934+656,174–

03Clark County, NVNV2,407,226+634,306–

04Harris County, TXTX5,045,026+582,379–

05Orange County, CACA3,149,507+435,733–

06Riverside County, CACA2,544,916+374,974–

07Broward County, FLFL2,013,317+367,530–

08Dallas County, TXTX2,661,397+366,089–

09San Diego County, CACA3,282,248+315,817–

10San Bernardino County, CACA2,224,091+291,054–

11Queens County, NYNY2,358,182+277,781–

12Tarrant County, TXTX2,248,466+276,116–

13Cook County, ILIL5,194,625+271,674–

14Palm Beach County, FLFL1,575,726+267,666–

15Travis County, TXTX1,389,670+235,873–

16Gwinnett County, GAGA1,018,099+235,538–

17King County, WAWA2,344,939+229,715–

18Collin County, TXTX1,297,179+227,639–

19Orange County, FLFL1,528,002+218,853–

20Bexar County, TXTX2,160,088+207,537–

21Wake County, NCNC1,257,235+204,466–

22Hidalgo County, TXTX921,549+185,918–

23Santa Clara County, CACA1,914,391+185,008–

24Mecklenburg County, NCNC1,233,383+184,021–

25Sacramento County, CACA1,618,460+182,280–

26Pima County, AZAZ1,074,685+176,866–

27Salt Lake County, UTUT1,220,916+172,431–

28Fulton County, GAGA1,098,791+167,055–

29Hillsborough County, FLFL1,574,115+164,894–

30Kings County, NYNY2,653,963+164,662–

31Alameda County, CACA1,636,630+164,559–

32Cobb County, GAGA793,345+160,006–

33Denton County, TXTX1,069,346+159,451–

34Fairfax County, VAVA1,167,873+151,165–

35Contra Costa County, CACA1,170,070+145,084–

36Will County, ILIL712,253+144,953–

37Snohomish County, WAWA870,656+140,382–

38Washington County, OROR611,708+133,788–

39Fresno County, CACA1,035,456+131,917–

40Fort Bend County, TXTX975,191+129,031–

41Bronx County, NYNY1,406,332+128,861–

42Lake County, ILIL719,339+127,938–

43DuPage County, ILIL934,298+122,495–

44DeKalb County, GAGA774,394+120,028–

45El Paso County, COCO757,040+119,915–

46Kern County, CACA927,068+118,168–

47Montgomery County, MDMD1,074,582+116,314–

48Douglas County, COCO399,396+115,375–

49Pierce County, WAWA946,288+114,617–

50Montgomery County, TXTX781,194+111,567–

51Oakland County, MIMI1,288,337+110,564–

52Williamson County, TXTX752,827+110,416–

53Franklin County, OHOH1,361,536+107,541–

54Clark County, WAWA532,119+107,185–

55Duval County, FLFL1,062,963+105,908–

56Lee County, FLFL875,607+105,775–

57Utah County, UTUT759,859+104,946–

58Collier County, FLFL417,131+99,278–

59Adams County, COCO554,668+98,819–

60Suffolk County, NYNY1,546,090+97,505–

61Arapahoe County, COCO673,820+96,456–

62Johnson County, KSKS636,906+96,032–

63Ada County, IDID546,141+95,129–

64Jefferson County, COCO580,451+88,626–

65El Paso County, TXTX877,858+88,012–

66Denver County, COCO740,613+87,026–

67Kane County, ILIL525,757+86,648–

68Washoe County, NVNV509,386+84,819–

69Ventura County, CACA830,851+84,181–

70Hennepin County, MNMN1,284,784+83,769–

71Loudoun County, VAVA449,749+83,470–

72San Joaquin County, CACA823,815+82,970–

73Dakota County, MNMN457,710+80,677–

74Polk County, FLFL874,790+78,542–

75Middlesex County, NJNJ883,335+78,382–

76Ocean County, NJNJ673,746+77,713–

77Seminole County, FLFL491,884+77,667–

78Brevard County, FLFL663,982+77,252–

79McHenry County, ILIL317,751+76,836–

80Multnomah County, OROR795,391+76,599–

81Stanislaus County, CACA557,719+76,475–

82Bernalillo County, NMNM667,601+76,101–

83Placer County, CACA442,081+75,603–

84Cameron County, TXTX433,946+75,107–

85Hamilton County, ININ387,036+73,804–

86Kent County, MIMI675,232+73,704–

87Guilford County, NCNC562,234+73,628–

88Volusia County, FLFL606,573+72,631–

89Prince George's County, MDMD970,374+72,247–

90Montgomery County, PAPA877,643+71,986–

91Shelby County, TNTN910,226+71,142–

92St. Charles County, MOMO426,499+70,976–

93Macomb County, MIMI886,221+70,749–

94Sonoma County, CACA486,444+70,392–

95Pinellas County, FLFL948,563+69,823–

96Middlesex County, MAMA1,669,979+66,928–

97Boulder County, COCO328,560+65,949–

98Larimer County, COCO377,292+65,358–

99Prince William County, VAVA502,966+65,127–

100Osceola County, FLFL481,718+64,765–

101Richmond County, NYNY501,290+64,751–

102Marion County, FLFL442,660+64,083–

103Pasco County, FLFL674,516+63,634–

104Rutherford County, TNTN386,352+63,453–

105Pinal County, AZAZ539,380+63,348–

106Marion County, ININ992,196+63,295–

107Anne Arundel County, MDMD603,380+62,417–

108Monmouth County, NJNJ651,035+62,177–

109Baltimore County, MDMD847,650+62,158–

110Mohave County, AZAZ228,102+61,535–

111Oklahoma County, OKOK822,125+60,837–

112Henry County, GAGA264,922+60,600–

113Howard County, MDMD339,183+60,514–

114Tulsa County, OKOK698,782+59,958–

115Webb County, TXTX281,224+59,878–

116Yavapai County, AZAZ252,552+59,803–

117Clackamas County, OROR426,280+59,541–

118Greenville County, SCSC583,125+59,449–

119Dane County, WIWI590,375+59,441–

120Davidson County, TNTN745,904+59,107–

121Bergen County, NJNJ977,026+58,738–

122Lake County, FLFL456,068+58,424–

123New Castle County, DEDE588,026+58,319–

124San Mateo County, CACA743,568+57,538–

125Somerset County, NJNJ356,486+57,211–

126Chester County, PAPA557,116+57,105–

127Spokane County, WAWA558,344+56,575–

128Bucks County, PAPA647,828+56,461–

129Marion County, OROR355,777+56,351–

130Tulare County, CACA485,146+56,100–

131Waukesha County, WIWI417,210+56,052–

132Benton County, ARAR332,554+55,907–

133Hudson County, NJNJ735,033+55,876–

134Washington County, MNMN286,895+55,234–

135Clayton County, GAGA297,471+54,465–

136Anoka County, MNMN381,605+54,443–

137Forsyth County, GAGA282,805+54,324–

138Solano County, CACA455,376+54,121–

139Essex County, MAMA826,653+53,339–

140Yuma County, AZAZ224,449+53,131–

141San Francisco County, CACA826,079+52,774–

142Horry County, SCSC427,551+52,576–

143Manatee County, FLFL468,200+52,295–

144Cherokee County, GAGA299,273+51,699–

145Davis County, UTUT381,227+51,053–

146Chesterfield County, VAVA397,148+50,629–

147Ottawa County, MIMI308,459+50,546–

148Brazoria County, TXTX419,080+50,060–

149New York County, NYNY1,664,862+49,659–

150Sedgwick County, KSKS538,433+49,207–

151Weld County, COCO378,426+49,115–

152Morris County, NJNJ524,251+48,859–

153Westchester County, NYNY1,015,743+48,593–

154Lexington County, SCSC317,588+48,403–

155Sarasota County, FLFL479,958+48,181–

156Lancaster County, PAPA563,159+47,836–

157Polk County, IAIA516,546+47,461–

158Chesapeake, VAVA255,332+47,208–

159Nassau County, NYNY1,398,939+47,196–

160Douglas County, NENE606,460+47,141–

161Leon County, FLFL299,048+46,959–

162Bell County, TXTX402,248+46,886–

163St. Tammany Parish, LALA279,108+46,760–

164Knox County, TNTN511,453+46,283–

165Thurston County, WAWA304,261+46,117–

166Monterey County, CACA433,729+46,102–

167Williamson County, TNTN272,061+45,617–

168Frederick County, MDMD302,883+45,069–

169Hillsborough County, NHNH433,415+44,768–

170Warren County, OHOH257,181+44,474–

171Henrico County, VAVA342,775+44,419–

172Washington County, ARAR271,213+44,306–

173Shelby County, ALAL238,552+43,935–

174Hall County, GAGA226,568+43,849–

175Sussex County, DEDE277,140+43,409–

176Delaware County, OHOH242,032+43,060–

177Monroe County, PAPA167,179+42,978–

178St. Lucie County, FLFL402,449+42,524–

179Kitsap County, WAWA283,374+42,238–

180York County, PAPA473,197+42,177–

181Baldwin County, ALAL267,761+42,135–

182Washington County, UTUT213,670+41,794–

183Durham County, NCNC347,240+41,479–

184Canyon County, IDID275,123+41,365–

185Butler County, OHOH400,128+41,328–

186Livingston County, MIMI197,315+41,306–

187Worcester County, MAMA888,502+41,258–

188Johnston County, NCNC256,448+40,659–

189Deschutes County, OROR213,072+40,409–

190Forsyth County, NCNC401,718+40,189–

191Paulding County, GAGA190,996+40,067–

192Lane County, OROR381,584+40,047–

193New Hanover County, NCNC245,959+40,023–

194Washtenaw County, MIMI370,214+39,958–

195Honolulu County, HIHI988,703+39,925–

196Union County, NCNC267,674+39,466–

197St. Johns County, FLFL346,328+39,306–

198DeSoto County, MSMS197,918+39,289–

199Doña Ana County, NMNM229,091+39,172–

200Whatcom County, WAWA236,392+39,034–

201Kootenai County, IDID191,864+38,890–

202Weber County, UTUT278,174+38,203–

203Madison County, ALAL433,516+37,788–

204Plymouth County, MAMA546,829+37,546–

205Berks County, PAPA440,072+37,115–

206Lancaster County, NENE334,049+36,650–

207Harford County, MDMD266,446+36,458–

208Alachua County, FLFL290,028+36,359–

209Santa Rosa County, FLFL211,115+36,135–

210Passaic County, NJNJ531,624+35,989–

211Barnstable County, MAMA233,539+35,625–

212Coweta County, GAGA160,240+35,362–

213Fayette County, KYKY329,751+35,146–

214Madera County, CACA167,927+35,019–

215Richland County, SCSC434,956+34,957–

216Jackson County, OROR221,795+34,880–

217Clay County, FLFL239,593+34,828–

218Beaufort County, SCSC204,433+34,512–

219Montgomery County, TNTN249,935+34,270–

220Norfolk County, MAMA739,749+34,221–

221Anchorage, AKAK287,155+33,945–

222Cleveland County, OKOK303,973+33,763–

223Yakima County, WAWA259,185+33,758–

224Orange County, NYNY417,669+33,720–

225York County, SCSC306,887+33,117–

226Imperial County, CACA181,411+33,058–

227Spotsylvania County, VAVA155,388+32,992–

228Galveston County, TXTX372,207+32,759–

229East Baton Rouge Parish, LALA456,180+32,747–

230Greene County, MOMO309,286+32,442–

231Virginia Beach, VAVA453,737+32,188–

232Brown County, WIWI275,803+32,184–

233Merced County, CACA297,260+32,151–

234Cabarrus County, NCNC249,725+32,128–

235Hays County, TXTX304,390+31,975–

236Scott County, MNMN159,017+31,652–

237Escambia County, FLFL333,834+31,612–

238Rockingham County, NHNH324,077+31,514–

239Buncombe County, NCNC277,417+31,509–

240Stafford County, VAVA170,803+31,210–

241Allen County, ININ402,329+31,013–

242Charlotte County, FLFL217,212+30,652–

243Clay County, MOMO265,032+30,595–

244Brazos County, TXTX249,088+30,553–

245Santa Fe County, NMNM156,907+30,364–

246El Dorado County, CACA192,323+30,304–

247Benton County, WAWA221,722+29,915–

248Santa Barbara County, CACA442,065+29,739–

249Iredell County, NCNC211,798+29,729–

250Hernando County, FLFL221,701+29,687–

251Johnson County, TXTX218,048+29,646–

252San Luis Obispo County, CACA282,367+29,519–

253Fayette County, GAGA125,156+28,848–

254Medina County, OHOH185,025+28,741–

255Union County, NJNJ601,863+28,722–

256Jefferson County, KYKY795,222+28,667–

257Boone County, KYKY145,316+28,402–

258Cumberland County, NCNC338,473+28,397–

259Hendricks County, ININ193,510+28,376–

260Hawaii County, HIHI210,043+28,360–

261Bristol County, MAMA593,640+28,353–

262Burlington County, NJNJ481,439+28,328–

263Atlantic County, NJNJ278,657+28,225–

264Rankin County, MSMS162,181+28,166–

265Kings County, CACA154,327+27,992–

266Lee County, ALAL189,881+27,946–

267Summit County, OHOH538,376+27,909–

268Clermont County, OHOH216,977+27,790–

269Maui County, HIHI160,592+27,720–

270Yolo County, CACA224,410+27,568–

271Carroll County, MDMD176,677+27,525–

272Sumner County, TNTN215,538+27,168–

273Johnson County, ININ174,262+27,100–

274Spartanburg County, SCSC380,857+26,991–

275Okaloosa County, FLFL221,810+26,722–

276Jefferson County, MOMO233,132+26,719–

277Elkhart County, ININ208,774+26,593–

278Sandoval County, NMNM159,565+26,589–

279Ellis County, TXTX240,867+26,193–

280Comal County, TXTX209,166+26,189–

281Faulkner County, ARAR133,979+26,008–

282Suffolk County, MAMA791,891+25,901–

283Pitt County, NCNC182,936+25,874–

284Santa Cruz County, CACA258,852+25,868–

285Martin County, FLFL166,272+25,831–

286Lafayette Parish, LALA257,949+25,741–

287Winnebago County, ILIL283,674+25,505–

288Providence County, RIRI678,179+25,332–

289Ramsey County, MNMN541,623+25,270–

290Mercer County, NJNJ399,289+24,937–

291Gloucester County, NJNJ312,638+24,591–

292Citrus County, FLFL171,666+24,570–

293Minnehaha County, SDSD212,691+24,472–

294McLennan County, TXTX272,020+24,394–

295Orange County, NCNC152,498+24,376–

296Harrison County, MSMS217,136+24,236–

297Guadalupe County, TXTX201,111+24,150–

298Randolph County, NCNC149,516+23,908–

299Parker County, TXTX184,767+23,710–

300Skagit County, WAWA132,975+23,424–

301Smith County, TXTX252,549+23,397–

302Catawba County, NCNC170,172+23,273–

303Columbia County, GAGA169,189+23,257–

304Harnett County, NCNC150,137+23,203–

305Calvert County, MDMD94,484+23,191–

306Mesa County, COCO162,845+23,110–

307Boone County, MOMO191,746+23,075–

308Hanover County, VAVA116,423+23,014–

309Linn County, IAIA232,028+22,934–

310St. Louis County, MOMO990,911+22,786–

311Indian River County, FLFL172,799+22,739–

312Alamance County, NCNC186,177+22,587–

313Nueces County, TXTX352,992+22,500–

314Cumberland County, MEME317,222+22,477–

315Sherburne County, MNMN104,194+22,472–

316Hamilton County, TNTN390,833+22,360–

317Carver County, MNMN114,379+22,290–

318San Juan County, NMNM120,340+22,196–

319Washington County, WIWI139,238+22,165–

320Brunswick County, NCNC174,702+22,158–

321York County, MEME222,434+22,155–

322Walton County, GAGA112,696+22,101–

323Butler County, PAPA200,169+22,070–

324Sumter County, FLFL157,772+21,768–

325Jackson County, MOMO732,994+21,648–

326Christian County, MOMO96,725+21,641–

327Aiken County, SCSC181,515+21,612–

328Houston County, GAGA178,214+21,557–

329Kenosha County, WIWI168,448+21,396–

330Monroe County, NYNY750,506+21,375–

331Livingston Parish, LALA155,036+21,288–

332Rockland County, NYNY357,397+21,278–

333Wright County, MNMN157,559+21,276–

334McLean County, ILIL171,419+21,253–

335Bay County, FLFL204,479+21,223–

336Cache County, UTUT145,000+21,208–

337Mobile County, ALAL411,658+21,200–

338Wilson County, TNTN175,033+21,134–

339Flagler County, FLFL140,360+21,131–

340Douglas County, GAGA154,293+21,054–

341Butte County, CACA209,211+21,051–

342Lehigh County, PAPA384,383+20,960–

343Valencia County, NMNM82,013+20,917–

344Madison County, MSMS116,298+20,880–

345Dutchess County, NYNY300,708+20,688–

346Davidson County, NCNC180,182+20,569–

347Anderson County, SCSC219,930+20,544–

348Outagamie County, WIWI195,894+20,461–

349Cass County, NDND201,794+20,264–

350Newton County, GAGA125,583+20,193–

351Cochise County, AZAZ126,332+20,131–

352Sevier County, TNTN101,342+20,127–

353Bartow County, GAGA120,800+20,108–

354Sarpy County, NENE208,303+20,012–

355Lubbock County, TXTX328,906+19,992–

356Northampton County, PAPA324,411+19,961–

357Grant County, WAWA105,727+19,940–

358Henderson County, NCNC122,375+19,888–

359Blount County, TNTN143,820+19,854–

360Navajo County, AZAZ109,946+19,812–

361Rowan County, NCNC155,096+19,735–

362Eagle County, COCO54,291+19,731–

363Coconino County, AZAZ144,368+19,729–

364Matanuska-Susitna, AKAK118,666+19,639–

365Bastrop County, TXTX118,908+19,470–

366Yamhill County, OROR110,024+19,441–

367Charles County, MDMD176,593+19,392–

368Saratoga County, NYNY241,343+19,359–

369Saline County, ARAR133,288+19,346–

370Fairfield County, OHOH169,752+19,298–

371Kaufman County, TXTX209,235+19,093–

372Highlands County, FLFL111,122+18,934–

373Walworth County, WIWI106,127+18,759–

374St. Clair County, MIMI160,486+18,628–

375Arlington County, VAVA243,931+18,517–

376St. Joseph County, ININ272,861+18,507–

377Pueblo County, COCO169,277+18,421–

378Cumberland County, PAPA277,270+18,417–

379Ascension Parish, LALA135,105+18,413–

380Tippecanoe County, ININ190,456+18,357–

381Pike County, PAPA62,808+18,336–

382Cass County, MOMO115,859+18,284–

383Douglas County, KSKS120,920+18,164–

384Robeson County, NCNC119,941+18,160–

385Porter County, ININ176,049+17,866–

386Olmsted County, MNMN166,731+17,807–

387Rockwall County, TXTX140,738+17,476–

388Liberty County, TXTX121,364+17,428–

389Gallatin County, MTMT128,740+17,368–

390Marin County, CACA253,694+17,193–

391Licking County, OHOH185,564+17,191–

392Missoula County, MTMT123,513+17,115–

393Alexandria, VAVA160,662+17,100–

394Pickens County, SCSC139,198+16,863–

395Elmore County, ALAL91,577+16,664–

396Berkeley County, WVWV139,522+16,652–

397San Benito County, CACA70,082+16,537–

398Winnebago County, WIWI174,218+16,443–

399Barrow County, GAGA99,773+16,423–

400Shasta County, CACA181,648+16,220–

401Merrimack County, NHNH158,078+16,220–

402Jackson County, MSMS147,666+16,177–

403Lowndes County, GAGA122,867+16,134–

404Rockdale County, GAGA98,416+16,020–

405Yellowstone County, MTMT172,692+15,933–

406Platte County, MOMO114,400+15,914–

407Warren County, KYKY149,375+15,849–

408Carroll County, GAGA131,036+15,846–

409Moore County, NCNC110,619+15,756–

410Kent County, DEDE194,786+15,704–

411Potter County, TXTX114,453+15,672–

412Grayson County, TXTX153,613+15,574–

413Sebastian County, ARAR130,641+15,481–

414Rogers County, OKOK102,197+15,471–

415Calcasieu Parish, LALA208,466+15,443–

416Essex County, NJNJ896,379+15,427–

417Gaston County, NCNC246,558+15,272–

418Flathead County, MTMT115,429+15,253–

419Kalamazoo County, MIMI263,795+15,192–

420Allegan County, MIMI123,188+15,156–

421Kendall County, ILIL145,470+15,131–

422Chatham County, GAGA311,855+15,113–

423Charleston County, SCSC436,200+14,930–

424Johnson County, IAIA160,044+14,887–

425Washington County, TNTN141,199+14,883–

426Tangipahoa Parish, LALA141,346+14,879–

427Chittenden County, VTVT169,115+14,810–

428Henderson County, TXTX88,595+14,734–

429St. Clair County, ALAL98,206+14,733–

430Bedford County, VAVA83,059+14,715–

431Nye County, NVNV57,336+14,704–

432Maury County, TNTN118,131+14,686–

433Garland County, ARAR99,695+14,671–

434Randall County, TXTX152,351+14,639–

435Cecil County, MDMD107,131+14,604–

436Sutter County, CACA98,787+14,515–

437Lyon County, NVNV65,088+14,500–

438Montgomery County, ALAL225,891+14,425–

439Stearns County, MNMN164,110+14,375–

440Chelan County, WAWA81,941+14,366–

441Tuscaloosa County, ALAL241,368+14,353–

442Bradley County, TNTN115,465+14,253–

443Jasper County, MOMO127,428+14,221–

444Summit County, UTUT43,141+14,218–

445Hunterdon County, NJNJ131,781+14,213–

446Taney County, MOMO57,001+14,142–

447Tooele County, UTUT87,461+14,134–

448Wise County, TXTX83,778+14,114–

449McKinley County, NMNM68,119+14,112–

450Dauphin County, PAPA293,351+13,985–

451Columbia County, FLFL74,094+13,900–

452Clarke County, GAGA129,921+13,895–

453York County, VAVA71,374+13,875–

454Berkeley County, SCSC274,666+13,875–

455Fremont County, COCO50,039+13,872–

456Madison County, TNTN100,790+13,855–

457Garfield County, COCO63,474+13,817–

458Racine County, WIWI198,919+13,797–

459Nassau County, FLFL106,879+13,722–

460Tipton County, TNTN62,287+13,703–

461Bullitt County, KYKY86,454+13,669–

462Douglas County, NVNV50,111+13,622–

463Lonoke County, ARAR76,664+13,560–

464Washington County, RIRI129,795+13,540–

465Lorain County, OHOH323,219+13,538–

466Nevada County, CACA101,911+13,523–

467Napa County, CACA132,949+13,514–

468Camden County, GAGA60,143+13,497–

469Frederick County, VAVA99,955+13,486–

470Lincoln County, NCNC98,654+13,461–

471Burke County, NCNC88,655+13,404–

472Grand Traverse County, MIMI96,729+13,381–

473Madison County, KYKY101,696+13,364–

474Dorchester County, SCSC178,397+13,353–

475Canadian County, OKOK187,189+13,288–

476James City County, VAVA83,326+13,243–

477Sussex County, NJNJ148,063+13,223–

478Franklin County, MOMO108,090+13,204–

479Craighead County, ARAR116,957+13,192–

480Lapeer County, MIMI89,516+13,136–

481Starr County, TXTX66,319+13,079–

482Josephine County, OROR87,867+13,077–

483Adams County, PAPA107,594+13,018–

484Iron County, UTUT67,141+12,990–

485Robertson County, TNTN80,175+12,939–

486Oldham County, KYKY70,986+12,915–

487St. Croix County, WIWI98,276+12,904–

488Sampson County, NCNC61,504+12,864–

489Bulloch County, GAGA86,949+12,858–

490Walton County, FLFL93,288+12,841–

491Polk County, OROR90,037+12,839–

492Rock County, WIWI166,472+12,797–

493Jefferson County, TXTX254,321+12,654–

494Hampton, VAVA137,315+12,644–

495White County, ARAR80,085+12,489–

496Ulster County, NYNY183,330+12,445–

497Monroe County, MIMI156,004+12,345–

498Hunt County, TXTX123,336+12,253–

499Pender County, NCNC72,111+12,227–

500Bossier Parish, LALA131,867+12,222–

SHOWING 1–500 OF 3,122

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Download CSV (full list, 3,122 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS

Frequently asked

Which county has the highest population change?

Maricopa County, Arizona ranks #1 with +950,048 (2000 Decennial Census).

What are the top 5 counties by population change?

Maricopa County, Arizona, Los Angeles County, California, Clark County, Nevada, Harris County, Texas, Orange County, California.

How many counties are in this ranking?

3,122 counties qualify after filtering for population minimums and data availability. The ranking covers 2000 Decennial Census data.

How is population change measured?

Change in the number of residents from the prior decennial census (raw count, not a percentage). Source: US Census Bureau, 2000 Decennial Census.