RANKING · 2010 CENSUS · 500 SHOWN OF 1,834

Largest Slovak population, US counties · 2010

US counties ranked by the number of residents who are Slovak ancestry, from the 2023 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. Allegheny County, Pennsylvania leads at 50,916. 1,834 counties qualify in total. Pennsylvania carries 12 of the top 25 entries.

All statesAll rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSLOVAK POPULATIONVS 2000

01Allegheny County, PAPA1,225,03550,916–

02Cuyahoga County, OHOH1,232,92543,131–

03Westmoreland County, PAPA349,32424,541–

04Luzerne County, PAPA332,12618,516–

05Mahoning County, OHOH224,70617,550–

06Cook County, ILIL5,194,62514,558–

07Lorain County, OHOH323,21910,981–

08Cambria County, PAPA128,96810,898–

09Summit County, OHOH538,37610,163–

10Lake County, ININ504,6129,890–

11Fayette County, PAPA123,0219,498–

12Lehigh County, PAPA384,3839,428–

13Washington County, PAPA210,8029,186–

14Trumbull County, OHOH198,9728,417–

15Lackawanna County, PAPA216,5027,181–

16Medina County, OHOH185,0257,074–

17Northampton County, PAPA324,4117,016–

18Maricopa County, AZAZ4,689,5586,757–

19Broome County, NYNY195,7366,570–

20Montgomery County, PAPA877,6436,201–

21Middlesex County, NJNJ883,3356,127–

22Lake County, OHOH232,2176,095–

23Beaver County, PAPA166,0325,863–

24Will County, ILIL712,2535,803–

25Butler County, PAPA200,1695,770–

26Erie County, PAPA265,8325,402–

27Franklin County, OHOH1,361,5365,279–

28DuPage County, ILIL934,2985,262–

29Schuylkill County, PAPA145,0855,222–

30Macomb County, MIMI886,2214,934–

31Wayne County, MIMI1,769,0384,867–

32Los Angeles County, CACA9,694,9344,761–

33Mercer County, PAPA107,8604,757–

34Bucks County, PAPA647,8284,547–

35Stark County, OHOH373,7714,539–

36Chester County, PAPA557,1164,513–

37Oakland County, MIMI1,288,3374,346–

38Carbon County, PAPA65,8684,301–

39Fairfax County, VAVA1,167,8734,211–

40Berks County, PAPA440,0724,149–

41Indiana County, PAPA82,8784,100–

42Ocean County, NJNJ673,7463,860–

43Portage County, OHOH163,4043,826–

44Porter County, ININ176,0493,403–

45Milwaukee County, WIWI924,2163,363–

46LaSalle County, ILIL107,7733,186–

47Morris County, NJNJ524,2513,155–

48San Diego County, CACA3,282,2483,129–

49Orange County, CACA3,149,5073,112–

50Armstrong County, PAPA63,6983,077–

51Union County, NJNJ601,8633,067–

52Pinellas County, FLFL948,5632,990–

53Mercer County, NJNJ399,2892,924–

54Bergen County, NJNJ977,0262,904–

55Somerset County, NJNJ356,4862,886–

56Monmouth County, NJNJ651,0352,846–

57Centre County, PAPA157,3932,805–

58Clearfield County, PAPA78,1002,799–

59Clark County, NVNV2,407,2262,764–

60King County, WAWA2,344,9392,688–

61Hennepin County, MNMN1,284,7842,605–

62Westchester County, NYNY1,015,7432,547–

63Philadelphia County, PAPA1,574,2812,480–

64Lake County, ILIL719,3392,335–

65Broward County, FLFL2,013,3172,301–

66New York County, NYNY1,664,8622,298–

67Dauphin County, PAPA293,3512,279–

68Palm Beach County, FLFL1,575,7262,273–

69Delaware County, PAPA580,9372,264–

70Geauga County, OHOH95,6762,211–

71Montgomery County, MDMD1,074,5822,187–

72Burlington County, NJNJ481,4392,165–

73Lancaster County, PAPA563,1592,057–

74Hillsborough County, FLFL1,574,1152,037–

75Mecklenburg County, NCNC1,233,3832,029–

76Passaic County, NJNJ531,6242,022–

77Somerset County, PAPA72,0041,988–

78Wake County, NCNC1,257,2351,969–

79Suffolk County, NYNY1,546,0901,936–

80Lee County, FLFL875,6071,923–

81Cumberland County, PAPA277,2701,907–

82Waukesha County, WIWI417,2101,898–

83Lawrence County, PAPA83,9111,886–

84Queens County, NYNY2,358,1821,882–

85Kings County, NYNY2,653,9631,826–

86Anne Arundel County, MDMD603,3801,823–

87Jefferson County, OHOH63,5971,817–

88Harris County, TXTX5,045,0261,758–

89Ashtabula County, OHOH96,7131,747–

90Pima County, AZAZ1,074,6851,717–

91Orange County, FLFL1,528,0021,690–

92York County, PAPA473,1971,688–

93Hamilton County, OHOH838,4181,659–

94Pasco County, FLFL674,5161,656–

95Lucas County, OHOH423,3471,650–

96Lebanon County, PAPA146,3801,629–

97Erie County, NYNY946,7411,584–

98El Paso County, COCO757,0401,581–

99Baltimore County, MDMD847,6501,574–

100St. Louis County, MOMO990,9111,547–

101Nassau County, NYNY1,398,9391,528–

102Riverside County, CACA2,544,9161,461–

103Hunterdon County, NJNJ131,7811,460–

104Kane County, ILIL525,7571,459–

105Columbiana County, OHOH99,3771,437–

106Santa Clara County, CACA1,914,3911,427–

107Middlesex County, MAMA1,669,9791,383–

108Worcester County, MAMA888,5021,357–

109Genesee County, MIMI401,0931,349–

110Essex County, NJNJ896,3791,335–

111Seminole County, FLFL491,8841,295–

112Alameda County, CACA1,636,6301,292–

113Howard County, MDMD339,1831,292–

114Monroe County, PAPA167,1791,285–

115Hudson County, NJNJ735,0331,274–

116Brevard County, FLFL663,9821,270–

117Sarasota County, FLFL479,9581,264–

118Greene County, PAPA33,8851,261–

119Collier County, FLFL417,1311,184–

120Camden County, NJNJ535,7991,181–

121Montgomery County, OHOH539,5981,181–

122Sussex County, NJNJ148,0631,163–

123Crawford County, PAPA81,7921,149–

124Northumberland County, PAPA89,9201,148–

125Marion County, ININ992,1961,138–

126Manatee County, FLFL468,2001,111–

127Blair County, PAPA119,5411,096–

128Belmont County, OHOH64,4341,080–

129New Castle County, DEDE588,0261,074–

130Polk County, FLFL874,7901,056–

131Wood County, OHOH134,1761,052–

132Delaware County, OHOH242,0321,042–

133Orange County, NYNY417,6691,031–

134Miami-Dade County, FLFL2,802,0291,030–

135Pierce County, WAWA946,2881,019–

136Tarrant County, TXTX2,248,4661,007–

137Jefferson County, COCO580,451988–

138Susquehanna County, PAPA38,237964–

139Fulton County, GAGA1,098,791948–

140Onondaga County, NYNY466,584948–

141Douglas County, COCO399,396944–

142District of Columbia, DCDC693,645930–

143Duval County, FLFL1,062,963913–

144Bexar County, TXTX2,160,088912–

145Saratoga County, NYNY241,343911–

146Cobb County, GAGA793,345908–

147Arapahoe County, COCO673,820905–

148Hampden County, MAMA464,338901–

149Monongalia County, WVWV107,991898–

150Gloucester County, NJNJ312,638896–

151Monroe County, NYNY750,506893–

152Washtenaw County, MIMI370,214891–

153Kenosha County, WIWI168,448890–

154Volusia County, FLFL606,573888–

155Dutchess County, NYNY300,708888–

156Contra Costa County, CACA1,170,070881–

157Travis County, TXTX1,389,670868–

158San Francisco County, CACA826,079861–

159Prince George's County, MDMD970,374849–

160Columbia County, PAPA66,193838–

161San Bernardino County, CACA2,224,091835–

162Frederick County, MDMD302,883835–

163Butler County, OHOH400,128834–

164Boulder County, COCO328,560826–

165Wayne County, OHOH116,758822–

166Wayne County, PAPA51,703812–

167Rockland County, NYNY357,397801–

168Dallas County, TXTX2,661,397797–

169Kent County, MIMI675,232795–

170Denver County, COCO740,613794–

171Prince William County, VAVA502,966792–

172Dakota County, MNMN457,710788–

173Albany County, NYNY321,225780–

174Racine County, WIWI198,919780–

175Multnomah County, OROR795,391777–

176Virginia Beach, VAVA453,737774–

177Johnson County, KSKS636,906772–

178Muskegon County, MIMI177,901770–

179Guernsey County, OHOH38,379768–

180Charlotte County, FLFL217,212761–

181Salt Lake County, UTUT1,220,916748–

182McHenry County, ILIL317,751745–

183Gwinnett County, GAGA1,018,099741–

184Sacramento County, CACA1,618,460740–

185Suffolk County, MAMA791,891736–

186Warren County, NJNJ112,953732–

187Greenville County, SCSC583,125718–

188Loudoun County, VAVA449,749718–

189Madison County, ILIL263,110715–

190Ingham County, MIMI289,709713–

191Norfolk County, MAMA739,749712–

192Sangamon County, ILIL194,170712–

193Erie County, OHOH73,296712–

194Jefferson County, PAPA43,255710–

195Essex County, MAMA826,653708–

196St. Louis County, MNMN200,518704–

197Jefferson County, KYKY795,222703–

198Lake County, FLFL456,068701–

199Hamilton County, ININ387,036698–

200Snohomish County, WAWA870,656698–

201Wyoming County, PAPA25,790696–

202Harford County, MDMD266,446691–

203Chesterfield County, VAVA397,148689–

204Saginaw County, MIMI187,688681–

205Ottawa County, OHOH39,481681–

206Jackson County, MOMO732,994680–

207Livingston County, MIMI197,315674–

208Washington County, OROR611,708670–

209Bernalillo County, NMNM667,601668–

210Fulton County, NYNY52,216666–

211Pinal County, AZAZ539,380665–

212Larimer County, COCO377,292640–

213Arlington County, VAVA243,931628–

214Marion County, FLFL442,660627–

215St. Johns County, FLFL346,328625–

216Atlantic County, NJNJ278,657624–

217Anoka County, MNMN381,605619–

218Washington County, WIWI139,238618–

219York County, SCSC306,887616–

220Horry County, SCSC427,551613–

221McLean County, ILIL171,419611–

222Allen County, ININ402,329604–

223Kalamazoo County, MIMI263,795583–

224Ramsey County, MNMN541,623582–

225Washoe County, NVNV509,386577–

226Ventura County, CACA830,851571–

227Dane County, WIWI590,375568–

228Martin County, FLFL166,272565–

229Richmond County, NYNY501,290553–

230Shelby County, TNTN910,226552–

231Carroll County, MDMD176,677551–

232Tioga County, NYNY47,453549–

233Norfolk, VAVA231,013545–

234Schenectady County, NYNY162,581543–

235Williamson County, TXTX752,827541–

236Ulster County, NYNY183,330540–

237Hernando County, FLFL221,701539–

238Denton County, TXTX1,069,346538–

239Collin County, TXTX1,297,179536–

240Livingston County, ILIL35,057534–

241Shiawassee County, MIMI67,681533–

242Pueblo County, COCO169,277528–

243Providence County, RIRI678,179520–

244Solano County, CACA455,376513–

245Forsyth County, GAGA282,805512–

246Guilford County, NCNC562,234511–

247Franklin County, PAPA160,652507–

248Licking County, OHOH185,564502–

249St. Charles County, MOMO426,499500–

250Alexandria, VAVA160,662498–

251Forsyth County, NCNC401,718495–

252Ottawa County, MIMI308,459485–

253New Hanover County, NCNC245,959480–

254San Mateo County, CACA743,568477–

255Spokane County, WAWA558,344477–

256Tuscarawas County, OHOH92,373476–

257Athens County, OHOH63,197474–

258Warren County, OHOH257,181468–

259Sussex County, DEDE277,140467–

260St. Lucie County, FLFL402,449467–

261Greene County, OHOH174,322465–

262Kendall County, ILIL145,470461–

263Niagara County, NYNY208,912461–

264Polk County, IAIA516,546455–

265Brown County, WIWI275,803450–

266Hancock County, WVWV27,729444–

267Monterey County, CACA433,729439–

268Warren County, PAPA37,038439–

269Putnam County, NYNY99,028439–

270St. Clair County, MIMI160,486435–

271Adams County, COCO554,668434–

272Lycoming County, PAPA112,587432–

273Fairfield County, OHOH169,752432–

274Brooke County, WVWV21,142431–

275Anchorage, AKAK287,155429–

276Adams County, PAPA107,594428–

277Davidson County, TNTN745,904428–

278Peoria County, ILIL178,553425–

279Venango County, PAPA49,346425–

280Beaufort County, SCSC204,433425–

281Kent County, DEDE194,786420–

282Cherokee County, GAGA299,273420–

283Santa Barbara County, CACA442,065419–

284Hillsborough County, NHNH433,415419–

285Montgomery County, TXTX781,194413–

286Chittenden County, VTVT169,115413–

287Henrico County, VAVA342,775412–

288DeKalb County, GAGA774,394410–

289Charles County, MDMD176,593410–

290Leon County, FLFL299,048406–

291Hendricks County, ININ193,510404–

292San Joaquin County, CACA823,815402–

293Citrus County, FLFL171,666400–

294Jefferson County, ALAL665,742400–

295Grundy County, ILIL54,052397–

296Macoupin County, ILIL43,748396–

297St. Mary's County, MDMD116,692395–

298Sumter County, FLFL157,772394–

299Clark County, OHOH135,340393–

300St. Joseph County, ININ272,861391–

301St. Clair County, ILIL250,708389–

302Clay County, FLFL239,593385–

303Hampshire County, MAMA164,065381–

304Rockingham County, NHNH324,077374–

305Sonoma County, CACA486,444373–

306Baltimore, MDMD569,997373–

307Ashland County, OHOH52,523367–

308Champaign County, ILIL209,972366–

309Barnstable County, MAMA233,539365–

310Douglas County, NENE606,460364–

311Richmond, VAVA237,257359–

312Noble County, OHOH14,276357–

313Monroe County, MIMI156,004356–

314Charleston County, SCSC436,200349–

315Okaloosa County, FLFL221,810346–

316Placer County, CACA442,081345–

317Clackamas County, OROR426,280345–

318Yavapai County, AZAZ252,552344–

319Durham County, NCNC347,240340–

320Bedford County, PAPA47,480339–

321Pike County, PAPA62,808339–

322Thurston County, WAWA304,261339–

323LaPorte County, ININ111,294338–

324Hanover County, VAVA116,423334–

325Flagler County, FLFL140,360333–

326Ozaukee County, WIWI94,346333–

327Marin County, CACA253,694331–

328Clinton County, PAPA37,870330–

329Clinton County, MIMI80,432328–

330St. Louis, MOMO278,144328–

331Santa Cruz County, CACA258,852327–

332Honolulu County, HIHI988,703325–

333Eaton County, MIMI109,581324–

334Washington County, MDMD157,731321–

335Oklahoma County, OKOK822,125316–

336Ohio County, WVWV40,496316–

337Bristol County, MAMA593,640315–

338Dorchester County, SCSC178,397313–

339Fort Bend County, TXTX975,191313–

340York County, VAVA71,374309–

341Wright County, MNMN157,559308–

342Stafford County, VAVA170,803308–

343Androscoggin County, MEME116,487306–

344Clark County, WAWA532,119306–

345Sandoval County, NMNM159,565305–

346Hamilton County, TNTN390,833295–

347Cumberland County, MEME317,222294–

348Galveston County, TXTX372,207294–

349Fayette County, KYKY329,751287–

350Boone County, ININ80,689286–

351Delaware County, NYNY44,305285–

352Ada County, IDID546,141283–

353Washington County, MNMN286,895283–

354Cumberland County, NCNC338,473283–

355El Paso County, TXTX877,858282–

356Huron County, OHOH58,250279–

357Huntingdon County, PAPA43,001275–

358Caroline County, MDMD34,116274–

359Queen Anne's County, MDMD54,448273–

360Ontario County, NYNY113,130273–

361Harrison County, WVWV64,221269–

362Bayfield County, WIWI16,787269–

363Tulsa County, OKOK698,782268–

364Weld County, COCO378,426267–

365Brunswick County, NCNC174,702267–

366Plymouth County, MAMA546,829266–

367Kankakee County, ILIL105,525266–

368Santa Fe County, NMNM156,907265–

369Mobile County, ALAL411,658264–

370Calvert County, MDMD94,484264–

371Jackson County, OROR221,795264–

372McKean County, PAPA38,984264–

373Allegan County, MIMI123,188262–

374Clermont County, OHOH216,977262–

375DeKalb County, ILIL101,835260–

376Union County, NCNC267,674259–

377Fauquier County, VAVA76,503258–

378Jasper County, ININ33,894255–

379Elk County, PAPA29,926255–

380Herkimer County, NYNY59,219255–

381Lapeer County, MIMI89,516254–

382Chautauqua County, NYNY124,126254–

383Sheboygan County, WIWI118,047253–

384Tompkins County, NYNY104,047252–

385Marathon County, WIWI139,432252–

386Winnebago County, ILIL283,674251–

387Knox County, TNTN511,453251–

388Oneida County, NYNY226,392249–

389Monroe County, ININ143,345247–

390Vigo County, ININ106,512247–

391Lane County, OROR381,584247–

392Montour County, PAPA17,868247–

393Perry County, PAPA46,806246–

394Dunn County, WIWI46,223244–

395Spotsylvania County, VAVA155,388242–

396Chatham County, GAGA311,855241–

397Jackson County, MIMI159,552241–

398Onslow County, NCNC217,175241–

399Albemarle County, VAVA118,356241–

400Rutherford County, TNTN386,352241–

401Nassau County, FLFL106,879240–

402Deschutes County, OROR213,072239–

403Cape May County, NJNJ93,390239–

404Indian River County, FLFL172,799237–

405Kennebec County, MEME129,067236–

406Olmsted County, MNMN166,731236–

407Mesa County, COCO162,845235–

408Richland County, OHOH124,893235–

409Wood County, WVWV82,385235–

410Bradford County, PAPA59,600231–

411Williamson County, TNTN272,061229–

412San Luis Obispo County, CACA282,367227–

413Washington County, ARAR271,213227–

414Stearns County, MNMN164,110226–

415Rankin County, MSMS162,181226–

416Bronx County, NYNY1,406,332226–

417Josephine County, OROR87,867225–

418Berkeley County, WVWV139,522225–

419Pulaski County, ARAR404,611224–

420Bay County, FLFL204,479223–

421Midland County, MIMI83,754223–

422Vanderburgh County, ININ181,995221–

423Chesapeake, VAVA255,332221–

424Newport County, RIRI83,051219–

425Putnam County, WVWV56,885219–

426Jefferson County, MOMO233,132218–

427Iredell County, NCNC211,798217–

428Outagamie County, WIWI195,894217–

429Oxford County, MEME60,346216–

430La Crosse County, WIWI121,339216–

431Cochise County, AZAZ126,332214–

432Vermilion County, ILIL71,259214–

433James City County, VAVA83,326214–

434Winnebago County, WIWI174,218214–

435Jefferson Parish, LALA431,398213–

436Brazoria County, TXTX419,080212–

437Santa Rosa County, FLFL211,115211–

438Muskingum County, OHOH87,014211–

439Douglas County, WIWI43,990209–

440Berkeley County, SCSC274,666208–

441Newport News, VAVA183,230207–

442Alachua County, FLFL290,028206–

443Tippecanoe County, ININ190,456205–

444Berkshire County, MAMA128,224204–

445Greene County, MOMO309,286204–

446Penobscot County, MEME157,967203–

447Coconino County, AZAZ144,368202–

448Mohave County, AZAZ228,102202–

449Johnson County, IAIA160,044202–

450Calhoun County, MIMI133,408202–

451Minnehaha County, SDSD212,691202–

452Walworth County, WIWI106,127202–

453Chemung County, NYNY80,415201–

454Washington County, NYNY59,353201–

455Cabarrus County, NCNC249,725201–

456El Dorado County, CACA192,323199–

457Knox County, OHOH64,002199–

458Price County, WIWI13,988198–

459Humboldt County, CACA131,647197–

460Grafton County, NHNH93,225195–

461Strafford County, NHNH135,043195–

462Harrison County, MSMS217,136193–

463Richland County, SCSC434,956193–

464Cheshire County, NHNH78,269193–

465Montgomery County, TNTN249,935193–

466Marion County, OROR355,777192–

467Johnson County, ININ174,262191–

468Matanuska-Susitna, AKAK118,666190–

469Marshall County, WVWV29,159190–

470Anderson County, SCSC219,930189–

471York County, MEME222,434188–

472Rensselaer County, NYNY160,510188–

473Gaston County, NCNC246,558188–

474Allen County, OHOH100,881187–

475Spartanburg County, SCSC380,857186–

476Bedford County, VAVA83,059186–

477Cumberland County, NJNJ157,148184–

478Utah County, UTUT759,859184–

479Florence County, SCSC138,504183–

480Catawba County, NCNC170,172183–

481Lenawee County, MIMI97,779181–

482Sullivan County, NYNY80,586181–

483St. Tammany Parish, LALA279,108178–

484Kanawha County, WVWV172,381178–

485Hancock County, OHOH75,034177–

486Roanoke County, VAVA97,150176–

487Escambia County, FLFL333,834175–

488Highlands County, FLFL111,122174–

489Douglas County, KSKS120,920174–

490Berrien County, MIMI152,444174–

491Monroe County, FLFL80,406173–

492Kern County, CACA927,068172–

493Orange County, NCNC152,498172–

494Laramie County, WYWY102,938172–

495Fond du Lac County, WIWI104,669170–

496Madison County, ALAL433,516169–

497Sagadahoc County, MEME37,979169–

498Rock Island County, ILIL141,869169–

499Breckinridge County, KYKY21,503168–

500Livingston County, NYNY61,438168–

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES

Frequently asked

Which county has the highest slovak population?

Allegheny County, Pennsylvania ranks #1 with 50,916 (2010 American Community Survey).

What are the top 5 counties by slovak population?

Allegheny County, Pennsylvania, Cuyahoga County, Ohio, Westmoreland County, Pennsylvania, Luzerne County, Pennsylvania, Mahoning County, Ohio.

How many counties are in this ranking?

1,834 counties qualify after filtering for population minimums and data availability. The ranking covers 2010 ACS 5-year data.

How is slovak population measured?

Number of residents who are Slovak ancestry (Ancestry, ACS detailed tables). Source: US Census Bureau, American Community Survey 5-year estimates (2010).