RANKING · 2024 ACS · 500 SHOWN OF 3,144

Youngest by median age, US counties

US counties with the youngest median age (2024 ACS). Madison County, Idaho leads at 21.4. 3,144 counties qualify in total. South Dakota carries 6 of the top 25 entries.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

USUnited States334,922,49938.9–

01Madison County, IDID55,17221.4+3%

02Lexington, VAVA7,76922.6−3%

03Buffalo County, SDSD1,80222.8−3%

04Radford, VAVA17,24323.3+2%

05Kusilvak Census Area, AKAK7,93223.6–

06Williamsburg, VAVA15,86123.7+5%

07Chattahoochee County, GAGA8,46524.4+5%

08Clay County, SDSD15,03124.9+0%

09Harrisonburg, VAVA50,83925.0+11%

10Oktibbeha County, MSMS51,89625.5+3%

11Todd County, SDSD8,86325.5+18%

12Riley County, KSKS72,59825.5+7%

13Utah County, UTUT759,85925.8+11%

14Jim Hogg County, TXTX4,55526.1−23%

15Cache County, UTUT145,00026.2+10%

16Whitman County, WAWA48,51226.4+7%

17Brazos County, TXTX249,08826.8+14%

18Story County, IAIA101,29126.9+2%

19Geary County, KSKS36,33827.1−7%

20Bennett County, SDSD3,30727.4−6%

21Onslow County, NCNC217,17527.7+11%

22Payne County, OKOK83,88927.7+0%

23Dewey County, SDSD5,41927.7+5%

24Pulaski County, MOMO54,44227.8−2%

25Brookings County, SDSD37,63528.0+5%

26Sioux County, NDND3,66728.2+18%

27Oglala Lakota County, SDSD13,33828.2–

28Lincoln Parish, LALA48,36028.6+8%

29Albany County, WYWY38,55828.6+7%

30Lynchburg, VAVA81,34728.6−19%

31Northwest Arctic, AKAK7,09528.8+21%

32Tippecanoe County, ININ190,45628.8+6%

33Christian County, KYKY70,11528.8+3%

34Bethel Census Area, AKAK18,39129.0+15%

35Kleberg County, TXTX30,31529.0−1%

36Liberty County, GAGA70,31329.0+16%

37Thurston County, NENE6,75229.2−2%

38Gaines County, TXTX23,95629.3−1%

39Adams County, WAWA21,48829.3−1%

40Nome Census Area, AKAK9,83029.4+7%

41Starr County, TXTX66,31929.4+13%

42Clarke County, GAGA129,92129.6+17%

43Corson County, SDSD3,78129.9+6%

44Dallam County, TXTX7,50829.9−5%

45Reagan County, TXTX3,16630.0−7%

46Wayne County, NENE10,02030.0+8%

47Webb County, TXTX281,22430.0+13%

48Isabella County, MIMI64,69130.1+20%

49Adair County, MOMO25,68430.2+8%

50Iron County, UTUT67,14130.2+25%

51Montgomery County, VAVA98,43430.2+17%

52Maverick County, TXTX58,82330.3+9%

53Hidalgo County, TXTX921,54930.5+12%

54Bulloch County, GAGA86,94930.5+17%

55Echols County, GAGA3,68530.5+3%

56Juab County, UTUT13,56730.6+15%

57Latah County, IDID41,84230.6+10%

58Lafayette County, MSMS59,59730.7+14%

59Champaign County, ILIL209,97230.7+7%

60Zavala County, TXTX9,03730.8+6%

61Grand Forks County, NDND74,50130.9+6%

62Roosevelt County, MTMT10,24230.9−4%

63Franklin County, WAWA102,61230.9+10%

64Johnson County, IAIA160,04431.0+9%

65Seward County, KSKS21,07331.0+7%

66Clark County, IDID78331.1+1%

67Moore County, TXTX21,89131.2+3%

68Monroe County, ININ143,34531.2+13%

69Deaf Smith County, TXTX18,62631.3+2%

70Waller County, TXTX69,85831.3+4%

71Watauga County, NCNC54,78631.4+5%

72Ector County, TXTX173,80131.4−2%

73Oldham County, TXTX1,78331.4−5%

74Johnson County, MOMO56,67031.5+11%

75McKenzie County, NDND15,19231.5−20%

76Pike County, ALAL33,68831.6−3%

77Blue Earth County, MNMN70,63431.6+6%

78Douglas County, KSKS120,92031.6+19%

79Dillingham Census Area, AKAK4,48331.7+10%

80Rowan County, KYKY24,47631.7+6%

81Merced County, CACA297,26031.8+10%

82Hamlin County, SDSD6,90031.8−16%

83Williams County, NDND41,76731.8−20%

84McMullen County, TXTX54431.8−26%

85Lowndes County, GAGA122,86731.8+5%

86Big Horn County, MTMT12,75231.9+7%

87Curry County, NMNM46,65531.9+4%

88Montgomery County, TNTN249,93531.9+6%

89Lubbock County, TXTX328,90631.9+5%

90Nacogdoches County, TXTX66,03531.9+7%

91Finney County, KSKS37,50531.9+14%

92Clark County, ARAR20,93832.0+1%

93Forrest County, MSMS79,03432.0+8%

94Cumberland County, NCNC338,47332.0+8%

95Erath County, TXTX43,91132.0+2%

96Wheeler County, GAGA7,57032.0−11%

97Leon County, FLFL299,04832.0+8%

98Sterling County, TXTX1,34932.1−15%

99Fredericksburg, VAVA30,39332.1+6%

100Tulare County, CACA485,14632.1+10%

101Yolo County, CACA224,41032.1+9%

102Hamilton County, KSKS2,50032.1−15%

103Houghton County, MIMI37,84232.2−5%

104Borden County, TXTX56732.2−20%

105Tooele County, UTUT87,46132.2+19%

106Bell County, TXTX402,24832.3+11%

107Yoakum County, TXTX7,43832.3−5%

108Zapata County, TXTX13,75332.3+5%

109Alachua County, FLFL290,02832.3+11%

110Ford County, KSKS33,99332.3+8%

111Roosevelt County, NMNM18,61532.3+9%

112Tompkins County, NYNY104,04732.3+13%

113Frio County, TXTX18,82332.3+5%

114Val Verde County, TXTX47,83532.3+5%

115Vernon Parish, LALA45,09132.4+14%

116Jackson County, ILIL52,50132.4+18%

117Fairbanks North Star, AKAK93,97232.5+10%

118Washington County, ARAR271,21332.5+6%

119Kings County, CACA154,32732.5+8%

120Dakota County, NENE21,68732.5+4%

121Lea County, NMNM74,74932.5−2%

122Rolette County, NDND11,68832.5+12%

123Davis County, UTUT381,22732.5+21%

124Benson County, NDND5,75932.6+4%

125Prince Edward County, VAVA22,39132.6+3%

126Kern County, CACA927,06832.7+7%

127Boone County, MOMO191,74632.7+11%

128Holmes County, OHOH44,97032.7+17%

129Cameron County, TXTX433,94632.7+13%

130Monongalia County, WVWV107,99132.7+8%

131DeKalb County, ILIL101,83532.7+15%

132LaGrange County, ININ41,30532.7+11%

133Norfolk, VAVA231,01332.7+10%

134Tuscaloosa County, ALAL241,36832.8+3%

135Coconino County, AZAZ144,36832.8+11%

136Cass County, NDND201,79432.8+5%

137Custer County, OKOK28,17532.8+0%

138Coryell County, TXTX85,59232.8+18%

139Midland County, TXTX187,85532.8−4%

140Jefferson County, IDID35,29732.8+14%

141Liberty County, TXTX121,36432.9−3%

142Pitt County, NCNC182,93633.0+9%

143Texas County, OKOK20,32233.0+9%

144Andrews County, TXTX18,91433.0−3%

145Taylor County, TXTX150,07733.1+3%

146Charlottesville, VAVA44,38833.1+29%

147Elmore County, IDID29,46533.1+14%

148Lyon County, KSKS32,26633.1+7%

149Imperial County, CACA181,41133.2+7%

150Athens County, OHOH63,19733.2+29%

151Uintah County, UTUT38,27833.2+14%

152Prince George County, VAVA43,93633.2+3%

153Alamosa County, COCO16,68833.2+8%

154Cassia County, IDID26,39733.2+7%

155Adams County, ININ36,65033.2+1%

156Ellis County, KSKS29,07533.2+2%

157Yakima County, WAWA259,18533.3+7%

158Warren County, KYKY149,37533.3+3%

159Ingham County, MIMI289,70933.3+10%

160Bailey County, TXTX6,96333.3−5%

161Ochiltree County, TXTX9,28433.3−1%

162Morgan County, UTUT13,38333.3+17%

163Franklin County, IDID15,88933.3+20%

164Box Elder County, UTUT65,32033.3+19%

165Natchitoches Parish, LALA36,08933.4+11%

166Glacier County, MTMT13,46333.4+9%

167Grant County, KSKS7,02833.4+6%

168Fresno County, CACA1,035,45633.5+12%

169Duval County, TXTX9,40233.6−1%

170Crawford County, KSKS39,00833.6−1%

171Ward County, NDND68,23333.6+4%

172El Paso County, TXTX877,85833.6+12%

173Bonneville County, IDID135,77133.6+6%

174Lake and Peninsula, AKAK1,35733.7+15%

175Clay County, MNMN67,73433.7+4%

176Nodaway County, MOMO20,17433.7+12%

177Jefferson County, NYNY111,54033.7+4%

178Weber County, UTUT278,17433.7+15%

179Clayton County, GAGA297,47133.7+12%

180Grant County, WAWA105,72733.7+8%

181Kaufman County, TXTX209,23533.8−3%

182Sioux County, IAIA36,77433.8+3%

183Sanpete County, UTUT31,45333.8+34%

184Suffolk County, MAMA791,89133.9+7%

185Stevens County, MNMN9,74733.9+0%

186Hoke County, NCNC56,93933.9+13%

187Jones County, SDSD91333.9−18%

188Lee County, ALAL189,88134.0+24%

189McLennan County, TXTX272,02034.0+7%

190Long County, GAGA21,55734.0+28%

191Jerome County, IDID26,36234.0+3%

192Salt Lake County, UTUT1,220,91634.0+18%

193Faulkner County, ARAR133,97934.1+10%

194East Baton Rouge Parish, LALA456,18034.1+8%

195Comanche County, OKOK122,15834.1+13%

196Hays County, TXTX304,39034.1+20%

197Dallas County, TXTX2,661,39734.1+10%

198Duchesne County, UTUT20,85634.1+20%

199Columbia County, ARAR21,89434.2−4%

200Gallatin County, MTMT128,74034.2+11%

201Centre County, PAPA157,39334.2+19%

202Rutherford County, TNTN386,35234.2+10%

203Yuba County, CACA88,69134.2+9%

204Lancaster County, NENE334,04934.3+7%

205Doña Ana County, NMNM229,09134.3+14%

206Woods County, OKOK8,44334.3−9%

207Jackson County, SDSD2,66634.3+12%

208McLean County, ILIL171,41934.3+12%

209Wyandotte County, KSKS170,59734.3+6%

210Willacy County, TXTX19,97134.3+15%

211Menominee County, WIWI4,19934.3+24%

212Richland County, SCSC434,95634.4+6%

213Hale County, TXTX31,81934.4+10%

214Reeves County, TXTX12,13834.4+7%

215Millard County, UTUT14,05734.4+15%

216Marion County, ININ992,19634.4+2%

217Beaver County, UTUT7,30134.4+12%

218Newport News, VAVA183,23034.4+7%

219Hill County, MTMT16,16734.5+0%

220Benton County, OROR97,72834.5+11%

221Castro County, TXTX7,29534.5+7%

222Craighead County, ARAR116,95734.5+5%

223Daviess County, ININ34,20934.5−3%

224Uvalde County, TXTX24,96334.5+7%

225Ward County, TXTX11,12534.5−4%

226Davidson County, TNTN745,90434.6+1%

227Harris County, TXTX5,045,02634.6+11%

228Madera County, CACA167,92734.6+6%

229McKinley County, NMNM68,11934.6+29%

230Santa Barbara County, CACA442,06534.6+4%

231Power County, IDID8,24634.6+9%

232Sevier County, ARAR15,75834.7+3%

233Leflore County, MSMS25,68634.7+15%

234San Bernardino County, CACA2,224,09134.7+15%

235Richmond, VAVA237,25734.7+2%

236Camden County, GAGA60,14334.7+23%

237Madison County, KYKY101,69634.7+13%

238Rockland County, NYNY357,39734.8−4%

239Stark County, NDND34,01334.8−6%

240Bexar County, TXTX2,160,08834.8+8%

241Franklin County, OHOH1,361,53634.8+7%

242Adams County, COCO554,66834.8+11%

243Dawson County, TXTX11,77634.8−2%

244Manassas, VAVA44,33234.8+11%

245Titus County, TXTX31,56334.9+10%

246Randolph County, GAGA6,15634.9−3%

247Graham County, AZAZ40,15734.9+13%

248Canyon County, IDID275,12334.9+14%

249Stanislaus County, CACA557,71934.9+10%

250District of Columbia, DCDC693,64534.9+1%

251Minidoka County, IDID22,91134.9+4%

252McDonough County, ILIL25,91634.9+20%

253North Slope, AKAK10,58235.0+30%

254Kalamazoo County, MIMI263,79535.0+7%

255Washtenaw County, MIMI370,21435.0+12%

256Crane County, TXTX4,55435.0+2%

257Trousdale County, TNTN12,62335.0−8%

258Bryan County, GAGA52,06235.0+5%

259Bingham County, IDID51,15335.0+18%

260San Juan County, UTUT14,54235.0+37%

261Kodiak Island, AKAK12,38735.1+11%

262Stearns County, MNMN164,11035.1+11%

263Claiborne County, MSMS8,05835.1+37%

264Buffalo County, NENE51,17235.1+17%

265Jackson County, OKOK24,76435.1+6%

266Chambers County, TXTX57,59435.1+0%

267Potter County, TXTX114,45335.1+9%

268Winkler County, TXTX7,54035.1−0%

269El Paso County, COCO757,04035.1+6%

270Anchorage, AKAK287,15535.2+9%

271Richmond County, GAGA206,55935.2+9%

272Whitley County, KYKY37,29735.2−1%

273Hardin County, OHOH30,07235.2+6%

274Tarrant County, TXTX2,248,46635.2+9%

275Oklahoma County, OKOK822,12535.2+3%

276Bannock County, IDID91,59135.2+18%

277Madison Parish, LALA8,84435.3+18%

278Beltrami County, MNMN47,05535.3+12%

279Saline County, MOMO23,26535.3−5%

280De Baca County, NMNM1,64735.3−19%

281Denver County, COCO740,61335.3+7%

282Weld County, COCO378,42635.3+14%

283Thomas County, KSKS7,72535.3+0%

284Fayette County, KYKY329,75135.3+7%

285Philadelphia County, PAPA1,574,28135.3+3%

286Wichita County, TXTX129,55535.3+6%

287San Joaquin County, CACA823,81535.4+11%

288Mahnomen County, MNMN5,15335.4−7%

289Mountrail County, NDND9,39535.4−11%

290Garza County, TXTX4,51035.4+1%

291Hansford County, TXTX4,94435.4−3%

292Cleveland County, OKOK303,97335.4+10%

293Carroll County, GAGA131,03635.4+9%

294Muscogee County, GAGA202,17135.4+9%

295Monterey County, CACA433,72935.5+12%

296Colfax County, NENE10,93435.5+1%

297La Salle County, TXTX6,51735.5+8%

298Arlington County, VAVA243,93135.5+4%

299Mecklenburg County, NCNC1,233,38335.5+7%

300Milwaukee County, WIWI924,21635.5+5%

301Travis County, TXTX1,389,67035.6+17%

302Blaine County, MTMT6,86035.6+3%

303Dawson County, NENE24,45235.6+4%

304Douglas County, NENE606,46035.6+6%

305Elkhart County, ININ208,77435.6+8%

306Buena Vista County, IAIA20,44935.6−2%

307Harnett County, NCNC150,13735.6+10%

308Sumter County, ALAL11,58835.7+11%

309Bee County, TXTX32,51535.7+12%

310Nobles County, MNMN22,33835.7−5%

311Sarpy County, NENE208,30335.7+13%

312Elko County, NVNV54,81535.7+14%

313Jim Wells County, TXTX38,80435.7+9%

314Dane County, WIWI590,37535.7+8%

315Dimmit County, TXTX8,02435.7+13%

316Black Hawk County, IAIA131,53235.7+4%

317Phelps County, MOMO45,24735.8+3%

318Dawes County, NENE7,85835.8+17%

319Eau Claire County, WIWI109,03335.8+10%

320Hudson County, NJNJ735,03335.8+7%

321Hardee County, FLFL25,93235.8+9%

322Hendry County, FLFL48,27635.8+21%

323Delaware County, ININ113,10635.8+6%

324Petersburg, VAVA33,73435.8−3%

325Kittitas County, WAWA48,80335.8+14%

326Benton County, ARAR332,55435.9+2%

327Colusa County, CACA21,83635.9+14%

328Shelby County, TNTN910,22635.9+9%

329Calloway County, KYKY39,42135.9+4%

330Tangipahoa Parish, LALA141,34635.9+11%

331Kent County, MIMI675,23235.9+10%

332Coahoma County, MSMS19,84935.9+18%

333Pontotoc County, MSMS32,09635.9+3%

334Scott County, MSMS28,07335.9+6%

335Lincoln County, SDSD77,14535.9+6%

336Childress County, TXTX6,64335.9−2%

337Gregg County, TXTX126,09535.9+3%

338Hockley County, TXTX21,60035.9+8%

339Portsmouth, VAVA96,77735.9+4%

340Atkinson County, GAGA8,45435.9+17%

341Buena Vista, VAVA6,67235.9−5%

342Putnam County, TNTN86,61236.0+5%

343Bronx County, NYNY1,406,33236.0+15%

344Garfield County, OKOK61,77936.0−5%

345Tulsa County, OKOK698,78236.0+5%

346Charles Mix County, SDSD9,30336.0+1%

347Tom Green County, TXTX120,60236.0+7%

348Minnehaha County, SDSD212,69136.0+7%

349Coffee County, GAGA44,40736.0+12%

350Gwinnett County, GAGA1,018,09936.0+11%

351Sedgwick County, KSKS538,43336.0+7%

352Yuma County, AZAZ224,44936.1+6%

353San Benito County, CACA70,08236.1+15%

354Ramsey County, MNMN541,62336.1+7%

355Hall County, NENE63,63336.1+1%

356Orange County, NCNC152,49836.1+19%

357Malheur County, OROR32,26136.1+6%

358Lyman County, SDSD3,69436.1+5%

359Atascosa County, TXTX53,59036.1+12%

360Twin Falls County, IDID97,53936.1+3%

361Dunn County, WIWI46,22336.1+18%

362Decatur County, IAIA7,65536.1−1%

363Dallas County, IAIA118,45736.1+3%

364Woodbury County, IAIA106,64936.1+6%

365Atchison County, KSKS16,17236.1−0%

366Todd County, KYKY12,97236.1+1%

367Durham County, NCNC347,24036.1+12%

368Crittenden County, ARAR46,21036.2+13%

369Butte County, CACA209,21136.2+1%

370Glenn County, CACA28,14136.2+7%

371Wood County, OHOH134,17636.2+11%

372Wicomico County, MDMD106,89936.2+1%

373Baltimore, MDMD569,99736.2+3%

374Benton County, MNMN41,74436.2+13%

375Eddy County, NMNM62,50936.2−1%

376Pickens County, SCSC139,19836.2+11%

377St. Bernard Parish, LALA45,64236.2−1%

378Allen County, ININ402,32936.2+6%

379Polk County, IAIA516,54636.2+5%

380Greenlee County, AZAZ9,31236.3+8%

381George County, MSMS26,33136.3+9%

382Holmes County, MSMS15,46536.3+22%

383Tunica County, MSMS8,81936.3+19%

384Luna County, NMNM25,40736.3−1%

385Canadian County, OKOK187,18936.3+3%

386Morrow County, OROR12,60236.3+9%

387Ellis County, TXTX240,86736.3+9%

388Lipscomb County, TXTX2,95536.3−8%

389Parmer County, TXTX9,67836.3+13%

390Prince William County, VAVA502,96636.3+14%

391Stafford County, VAVA170,80336.3+10%

392Campbell County, WYWY48,14536.3+13%

393Houston County, GAGA178,21436.3+7%

394Kendall County, ILIL145,47036.3+6%

395Vigo County, ININ106,51236.3+4%

396Davis County, IAIA9,23036.3−6%

397Benton County, WAWA221,72236.3+6%

398Winona County, MNMN50,52336.4+11%

399Otero County, NMNM70,36836.4+8%

400Robeson County, NCNC119,94136.4+14%

401Swisher County, TXTX6,70336.4+5%

402Greene County, MOMO309,28636.4+4%

403Scott County, KYKY62,26236.4+12%

404Livingston Parish, LALA155,03636.4+11%

405Barrow County, GAGA99,77336.4+12%

406DeKalb County, GAGA774,39436.4+13%

407Fulton County, GAGA1,098,79136.4+11%

408Pottawatomie County, KSKS27,18636.4+1%

409Kings County, NYNY2,653,96336.5+10%

410Lafayette Parish, LALA257,94936.5+13%

411Ottawa County, MIMI308,45936.5+13%

412Scotland County, MOMO4,79636.5−2%

413Sutter County, CACA98,78736.5+7%

414Baldwin County, GAGA44,02936.5+7%

415Lumpkin County, GAGA36,17836.5+12%

416Manassas Park, VAVA16,56036.5+20%

417Apache County, AZAZ64,44536.6+36%

418Ascension Parish, LALA135,10536.6+14%

419LaSalle Parish, LALA15,15436.6+1%

420Ouachita Parish, LALA158,54236.6+13%

421Emporia, VAVA5,44736.6−6%

422Fairfax, VAVA26,77236.6−1%

423Grant County, KYKY26,18136.6+12%

424Orange County, FLFL1,528,00236.6+10%

425Dougherty County, GAGA82,61636.6+14%

426Turner County, GAGA8,98336.6+10%

427Whitfield County, GAGA106,21236.6+11%

428West Baton Rouge Parish, LALA28,75636.6+8%

429Matanuska-Susitna, AKAK118,66636.7+8%

430Bossier Parish, LALA131,86736.7+9%

431Ziebach County, SDSD2,38936.7+54%

432Brazoria County, TXTX419,08036.7+8%

433Mitchell County, TXTX8,94736.7−5%

434Navarro County, TXTX57,18136.7+4%

435Randall County, TXTX152,35136.7+5%

436Clark County, WIWI35,05236.7+2%

437St. Joseph County, ININ272,86136.7+7%

438Clinton County, ININ33,32236.7+3%

439Howard County, TXTX30,50436.7+1%

440Victoria County, TXTX92,65636.7+7%

441Jasper County, MOMO127,42836.8+5%

442St. Louis, MOMO278,14436.8+9%

443Hunt County, TXTX123,33636.8+4%

444Madison County, TXTX14,22636.8+10%

445Wasatch County, UTUT38,51436.8+25%

446Hampton, VAVA137,31536.8+8%

447Larimer County, COCO377,29236.8+11%

448Camas County, IDID1,31636.8−7%

449Bibb County, GAGA157,55636.8+6%

450Lanier County, GAGA10,62336.8+11%

451Newton County, GAGA125,58336.8+11%

452Sevier County, UTUT22,82736.8+21%

453Winchester, VAVA28,27236.8+5%

454Grant County, WIWI52,44636.8+3%

455Hinds County, MSMS211,88836.9+16%

456Umatilla County, OROR81,11936.9+7%

457Berkeley County, SCSC274,66636.9+15%

458Gray County, TXTX20,91936.9−5%

459Pecos County, TXTX14,56036.9+18%

460Scurry County, TXTX16,16236.9−0%

461Hamilton County, OHOH838,41836.9+4%

462Duval County, FLFL1,062,96336.9+8%

463Douglas County, GAGA154,29336.9+9%

464Paulding County, GAGA190,99636.9+18%

465Pope County, ARAR64,97637.0+6%

466Riverside County, CACA2,544,91637.0+12%

467Jackson County, MOMO732,99437.0+5%

468Webster County, MOMO43,05437.0+7%

469Cortland County, NYNY45,85037.0+8%

470Orange County, NYNY417,66937.0+7%

471Bryan County, OKOK51,36737.0+3%

472Bastrop County, TXTX118,90837.0+5%

473Denton County, TXTX1,069,34637.0+19%

474Jefferson County, TXTX254,32137.0+5%

475Terry County, TXTX11,72037.0+6%

476San Patricio County, TXTX72,05337.0+16%

477Sherburne County, MNMN104,19437.0+18%

478Effingham County, GAGA74,39737.0+10%

479Troup County, GAGA72,84437.0+7%

480Haskell County, KSKS3,59937.0+20%

481Pierce County, WAWA946,28837.0+9%

482Montgomery County, ALAL225,89137.1+11%

483Cape Girardeau County, MOMO83,99937.1+5%

484Acadia Parish, LALA57,03237.1+10%

485Rice County, MNMN69,93937.1+13%

486Sunflower County, MSMS22,89337.1+23%

487Missoula County, MTMT123,51337.1+12%

488Beckham County, OKOK22,15937.1+1%

489Cochran County, TXTX2,54637.1+6%

490Johnson County, TXTX218,04837.1+8%

491Lamb County, TXTX12,57937.1+2%

492Uinta County, WYWY20,72837.1+18%

493East Carroll Parish, LALA6,76037.1+20%

494Osceola County, FLFL481,71837.1+7%

495Charlton County, GAGA13,12137.1+11%

496Henry County, GAGA264,92237.1+11%

497Greeley County, KSKS1,18237.1−4%

498Kearny County, KSKS3,88837.1+17%

499Ottawa County, OKOK30,43837.2−0%

500Nueces County, TXTX352,99237.2+12%

SHOWING 1–500 OF 3,144

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Download CSV (full list, 3,144 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES

Frequently asked

Which county has the lowest median age?

Madison County, Idaho ranks #1 with 21.4 (2024 American Community Survey).

What are the top 5 counties by median age?

Madison County, Idaho, Lexington, Virginia, Buffalo County, South Dakota, Radford, Virginia, Kusilvak Census Area, Alaska.

How many counties are in this ranking?

3,144 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year data.

How is median age measured?

Median age of all residents. Source: US Census Bureau, American Community Survey 5-year estimates (2024).