RANKING · 2020 CENSUS · 500 SHOWN OF 3,134

Oldest housing stock, US counties · 2020

US counties ranked by oldest median year of construction (2020 ACS). Kings County, New York leads at 0. 3,134 counties qualify in total. Nebraska carries 7 of the top 25 entries.

Flip the list · Newest housing stock, US counties →

All statesAll rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS 1990

USUnited States331,449,2811977–

01Kings County, NYNY2,653,9630−100%

02St. Louis, MOMO278,1440−100%

03Sioux County, NENE1,1880−100%

04Kalawao County, HIHI820−100%

05Lincoln County, KSKS2,8610−100%

06Pawnee County, NENE2,5101940+0%

07Comanche County, KSKS1,6731940+0%

08Suffolk County, MAMA791,8911942+0%

09Cloud County, KSKS8,8331942−0%

10Schuylkill County, PAPA145,0851943+0%

11Republic County, KSKS4,6401943+0%

12San Francisco County, CACA826,0791944+0%

13Richardson County, NENE7,5301944+0%

14Adams County, IAIA3,6171944+0%

15Jewell County, KSKS2,8301944+0%

16Baltimore, MDMD569,9971945+0%

17Furnas County, NENE4,5241945+0%

18Montgomery County, NYNY50,0461945+0%

19Miner County, SDSD2,2811945+0%

20Jefferson County, NENE7,0701946+0%

21Osborne County, KSKS3,2851946+0%

22Clay County, KSKS7,9901946+0%

23Nance County, NENE3,2901946+0%

24Keokuk County, IAIA9,7971947+0%

25Deuel County, NENE1,8621948+0%

26Franklin County, NENE2,7951948+0%

27Hayes County, NENE8211948+0%

28Valley County, NENE4,0941948+0%

29Motley County, TXTX1,0431948−0%

30Philadelphia County, PAPA1,574,2811948+0%

31Terrell County, TXTX7021949−0%

32Greeley County, NENE2,1541949+1%

33Howard County, IAIA9,4151949+0%

34Ida County, IAIA6,7771949+1%

35Montgomery County, IAIA10,0021949+1%

36Pocahontas County, IAIA6,8191949+0%

37Taylor County, IAIA5,8351950+1%

38Lac qui Parle County, MNMN6,7041950+1%

39Boone County, NENE5,3551950+1%

40Nemaha County, NENE7,1021950+0%

41Webster County, NENE3,3361950+1%

42New York County, NYNY1,664,8621950+0%

43Covington, VAVA5,6801950+0%

44Audubon County, IAIA5,5091950+1%

45Harrison County, IAIA14,6231950+1%

46Cheyenne County, KSKS2,6041950+0%

47Edwards County, KSKS2,6401950+1%

48Smith County, KSKS3,5661950+1%

49Washington County, KSKS5,5331950+1%

50Nuckolls County, NENE4,1001951+1%

51McKean County, PAPA38,9841951+0%

52Sheridan County, NENE4,8091951+0%

53Hardin County, IAIA16,4551951+0%

54Sac County, IAIA9,5251951+0%

55Worth County, IAIA7,3381951+1%

56Rawlins County, KSKS2,4311951+1%

57Faribault County, MNMN13,8881952+0%

58Clay County, NENE6,1701952+1%

59Custer County, NENE10,5001952+1%

60Fillmore County, NENE5,4581952+0%

61Garden County, NENE1,8041952+1%

62Johnson County, NENE5,2181952+1%

63Sherman County, NENE2,9241952+1%

64Thayer County, NENE4,8421952+0%

65Bronx County, NYNY1,406,3321952+0%

66Orleans County, NYNY39,8251952+1%

67Queens County, NYNY2,358,1821952+0%

68Northumberland County, PAPA89,9201952+1%

69Hanson County, SDSD3,4561952+1%

70Greene County, IAIA8,6581952+1%

71Sedgwick County, COCO2,2471952+1%

72Randolph County, ININ24,4381952+0%

73Rush County, ININ16,7671952+1%

74Monona County, IAIA8,5391952+1%

75Tama County, IAIA16,7961952+1%

76Mitchell County, KSKS5,5901952+1%

77Rush County, KSKS2,8451952+1%

78Stafford County, KSKS4,0051952+1%

79Herkimer County, NYNY59,2191952+1%

80Garfield County, WAWA2,4161952+1%

81Decatur County, KSKS2,7161953+0%

82Harding County, NMNM6171953+1%

83Chautauqua County, NYNY124,1261953+1%

84Campbell County, SDSD1,3771953+1%

85Clark County, SDSD4,0311953+1%

86Douglas County, SDSD2,8881953+1%

87Gregory County, SDSD4,0371953+0%

88Jerauld County, SDSD1,6541953+1%

89Greene County, ILIL11,3131953+0%

90Benton County, ININ8,8831953+0%

91Cass County, IAIA12,9601953+0%

92Cherokee County, IAIA11,3691953+0%

93Dickinson County, KSKS18,6371953+0%

94Rice County, KSKS9,2661953+0%

95Burt County, NENE6,6781953+1%

96Berkshire County, MAMA128,2241954+0%

97Deer Lodge County, MTMT9,7091954+1%

98Prairie County, MTMT1,1121954+0%

99Dawes County, NENE7,8581954+0%

100Dixon County, NENE5,6021954+1%

101Fulton County, NYNY52,2161954+1%

102Schenectady County, NYNY162,5811954+1%

103Cambria County, PAPA128,9681954+0%

104Lackawanna County, PAPA216,5021954+1%

105Bon Homme County, SDSD7,2441954+1%

106Kenedy County, TXTX3191954−0%

107Loving County, TXTX521954+0%

108Ohio County, WVWV40,4961954+1%

109Niobrara County, WYWY2,3411954+0%

110Blaine County, NENE4581954+0%

111District of Columbia, DCDC693,6451954+0%

112Warren County, ILIL16,2221954+0%

113Cass County, ININ37,8361954+0%

114Butler County, IAIA14,0491954+0%

115Emmet County, IAIA9,1071954+0%

116Franklin County, IAIA9,8681954+1%

117Hamilton County, IAIA14,9441954+0%

118Page County, IAIA14,8561954+1%

119Wright County, IAIA12,8011954+0%

120Pawnee County, KSKS5,9911954+0%

121Pratt County, KSKS9,1171954+0%

122Russell County, KSKS6,5811954+0%

123Perkins County, NENE2,8491955+1%

124Chemung County, NYNY80,4151955+0%

125Gogebic County, MIMI14,2851955+1%

126Watonwan County, MNMN11,4591955+0%

127Yellow Medicine County, MNMN9,4771955+0%

128Silver Bow County, MTMT36,1181955+1%

129Boyd County, NENE1,6741955+1%

130Cedar County, NENE8,3731955+1%

131Hitchcock County, NENE2,4671955+1%

132Kimball County, NENE3,3911955+0%

133Union County, NJNJ601,8631955+0%

134Providence County, RIRI678,1791955+0%

135Aurora County, SDSD2,8011955+1%

136Sanborn County, SDSD2,3881955+1%

137Ottawa County, KSKS5,7441955+1%

138Barber County, KSKS4,0831955+1%

139Nassau County, NYNY1,398,9391955+0%

140Lawrence County, PAPA83,9111955+0%

141Ford County, ILIL13,2161955+0%

142Stark County, ILIL5,3191955+1%

143Vermilion County, ILIL71,2591955+0%

144Fayette County, IAIA19,0471955+1%

145Humboldt County, IAIA9,4091955+0%

146Lee County, IAIA32,3061955+0%

147Osceola County, IAIA5,9801955+1%

148Shelby County, IAIA11,6891955+1%

149Clark County, KSKS1,9001955+1%

150Elk County, KSKS2,4581955+1%

151Marshall County, KSKS9,8521955+1%

152Morris County, KSKS5,3481955+0%

153Norton County, KSKS5,2881955+1%

154Rooks County, KSKS4,6461955+0%

155Woodson County, KSKS3,1181955+1%

156Wyoming County, NYNY39,7411955+1%

157Milwaukee County, WIWI924,2161955+0%

158Wayne County, MIMI1,769,0381956+0%

159Dickens County, TXTX1,6921956+0%

160Martin County, MNMN19,4401956+0%

161Mower County, MNMN40,9711956+0%

162Renville County, MNMN14,3561956+0%

163Garfield County, NENE1,7101956+1%

164Essex County, NJNJ896,3791956+0%

165Passaic County, NJNJ531,6241956+0%

166Cayuga County, NYNY74,3651956+1%

167Cortland County, NYNY45,8501956+0%

168Erie County, NYNY946,7411956+0%

169Genesee County, NYNY58,4161956+0%

170Niagara County, NYNY208,9121956+0%

171Oneida County, NYNY226,3921956+0%

172Otsego County, NYNY60,5891956+1%

173Cuyahoga County, OHOH1,232,9251956+0%

174Delaware County, PAPA580,9371956+0%

175McPherson County, SDSD2,3471956+0%

176Turner County, SDSD9,3141956+1%

177Hall County, TXTX2,7371956+0%

178Des Moines County, IAIA38,0771956+0%

179Mitchell County, IAIA10,6501956+1%

180Greenwood County, KSKS5,8261956+1%

181Bureau County, ILIL32,5101956+1%

182Knox County, ILIL47,7671956+0%

183Scott County, ILIL4,8661956+1%

184Clinton County, IAIA46,0021956+0%

185Crawford County, IAIA16,2371956+0%

186Floyd County, IAIA14,9011956+0%

187Fremont County, IAIA6,5221956+0%

188Grundy County, IAIA12,3611956+0%

189Wapello County, IAIA35,2101956+0%

190Ellsworth County, KSKS6,2571956+1%

191Ness County, KSKS2,6171956+0%

192Wallace County, KSKS1,4411956−0%

193McPherson County, NENE3691956−0%

194Westchester County, NYNY1,015,7431956+0%

195Fayette County, PAPA123,0211956+0%

196Lexington, VAVA7,7691956+0%

197Carroll County, ILIL15,4191957+1%

198Orleans Parish, LALA362,1541957+0%

199Hampden County, MAMA464,3381957+0%

200Cottonwood County, MNMN11,4051957+0%

201Jackson County, MNMN9,8571957+0%

202Redwood County, MNMN15,2651957+0%

203Banner County, NENE6861957+1%

204Cuming County, NENE8,8231957+1%

205Dundy County, NENE1,5681957+0%

206Frontier County, NENE2,6551957+1%

207Seneca County, NYNY32,8831957+0%

208Hettinger County, NDND2,4921957+0%

209Allegheny County, PAPA1,225,0351957+0%

210Pierce County, NENE7,3781957+1%

211Red Willow County, NENE10,3071957+0%

212Richmond, VAVA237,2571957+0%

213Shoshone County, IDID14,1301957+0%

214Mercer County, ILIL15,2291957+0%

215Clinton County, ININ33,3221957+1%

216Cerro Gordo County, IAIA42,3721957+0%

217Kossuth County, IAIA14,3221957+0%

218Webster County, IAIA36,8381957+0%

219Woodbury County, IAIA106,6491957+0%

220Chase County, KSKS2,5721957+1%

221Graham County, KSKS2,3711957+0%

222Harper County, KSKS5,3701957+1%

223Neosho County, KSKS15,6371957+0%

224Allegany County, MDMD66,8481957+1%

225Cheyenne County, NENE9,5281957+0%

226Morrill County, NENE4,4041957+1%

227Luzerne County, PAPA332,1261957+1%

228Chippewa County, MNMN12,4061958+0%

229Rock County, MNMN9,5241958+0%

230Swift County, MNMN9,7631958+1%

231Atchison County, MOMO5,1751958+1%

232Fergus County, MTMT11,8251958+0%

233Antelope County, NENE6,3521958+1%

234Broome County, NYNY195,7361958+0%

235Slope County, NDND6281958+1%

236Seneca County, OHOH54,5221958+0%

237Cimarron County, OKOK2,0591958+0%

238Gilliam County, OROR1,9711958+0%

239Sherman County, OROR2,0511958+1%

240Beaver County, PAPA166,0321958+0%

241Blair County, PAPA119,5411958+1%

242Hutchinson County, SDSD7,4131958+1%

243Perkins County, SDSD2,8531958+0%

244Mitchell County, TXTX8,9471958−0%

245Runnels County, TXTX9,6931958+0%

246Golden Valley County, NDND1,8081958+0%

247Bent County, COCO5,7161958+0%

248Livingston County, ILIL35,0571958+0%

249Stephenson County, ILIL43,2201958+0%

250Miami County, ININ34,4871958+0%

251Hancock County, IAIA10,5281958+0%

252Marshall County, IAIA39,8901958+0%

253O'Brien County, IAIA14,2201958+1%

254Winneshiek County, IAIA19,7331958+1%

255Barton County, KSKS24,7901958+0%

256Hodgeman County, KSKS1,6191958+1%

257Montgomery County, KSKS30,1771958+1%

258Trego County, KSKS2,7401958+0%

259Roanoke, VAVA99,1111958+0%

260Cook County, ILIL5,194,6251959+0%

261Teton County, MTMT6,4961959+0%

262Blackford County, ININ11,7301959+0%

263Essex County, MAMA826,6531959+0%

264Franklin County, MAMA70,6981959+0%

265Freeborn County, MNMN30,4401959+0%

266Knox County, MOMO3,7281959+0%

267Keya Paha County, NENE7921959+1%

268York County, NENE14,5641959+0%

269Bergen County, NJNJ977,0261959+0%

270Belmont County, OHOH64,4341959+0%

271Sandusky County, OHOH58,6551959+0%

272Alfalfa County, OKOK5,6491959+1%

273Harmon County, OKOK2,3271959+0%

274Kiowa County, OKOK8,1811959+0%

275Tillman County, OKOK6,7801959+0%

276Armstrong County, PAPA63,6981959+0%

277Cameron County, PAPA4,2111959+1%

278Venango County, PAPA49,3461959+0%

279Kingsbury County, SDSD5,2841959+1%

280Spink County, SDSD6,1551959+1%

281Briscoe County, TXTX1,4741959+0%

282McDowell County, WVWV16,8781959+0%

283Marion County, WVWV55,5841959+0%

284Marshall County, WVWV29,1591959+0%

285Jefferson County, OHOH63,5971959+0%

286Van Wert County, OHOH29,0131959+0%

287McIntosh County, NDND2,4511959+0%

288Washington County, COCO4,7321959+1%

289Yuma County, COCO9,8961959+0%

290Edgar County, ILIL16,3231959+1%

291Fulton County, ILIL32,9011959+1%

292Lee County, ILIL32,9141959+0%

293Henry County, ININ49,1371959+0%

294Huntington County, ININ37,2241959+1%

295Adair County, IAIA7,4031959+1%

296Calhoun County, IAIA9,5621959+1%

297Brown County, KSKS9,1041959+1%

298Kingman County, KSKS7,0291959+1%

299Marion County, KSKS11,6341959+1%

300Meade County, KSKS3,8521959+0%

301Collingsworth County, TXTX2,4871959+0%

302Floyd County, TXTX4,8811959+0%

303Griggs County, NDND2,2391960+1%

304Union County, IAIA11,8291960+1%

305Lane County, KSKS1,5081960+0%

306Middlesex County, MAMA1,669,9791960+0%

307Houghton County, MIMI37,8421960+1%

308Big Stone County, MNMN5,0541960+1%

309Brown County, MNMN25,5171960+0%

310Pipestone County, MNMN9,2601960+1%

311Traverse County, MNMN3,1301960+1%

312Meagher County, MTMT2,1371960+0%

313Powell County, MTMT7,1571960+0%

314Wheatland County, MTMT2,1001960+1%

315Crawford County, OHOH41,8961960+0%

316Darke County, OHOH51,5201960+0%

317Henry County, OHOH27,5981960+0%

318Mahoning County, OHOH224,7061960+0%

319Washita County, OKOK10,8841960−0%

320Elk County, PAPA29,9261960+0%

321Warren County, PAPA37,0381960+0%

322Bristol County, RIRI50,0011960+0%

323Hand County, SDSD3,1211960+1%

324Gray County, TXTX20,9191960+0%

325Hancock County, WVWV27,7291960+0%

326Lawrence County, ILIL13,7901960+0%

327Wabash County, ININ30,7131960+0%

328Rock Island County, ILIL141,8691960+0%

329Washington County, NYNY59,3531960+1%

330Hudson County, NJNJ735,0331960+1%

331Henry County, ILIL48,0951960+0%

332Iroquois County, ILIL26,1501960+0%

333Logan County, ILIL27,1821960+0%

334White County, ILIL13,2501960+0%

335Jay County, ININ20,1181960+1%

336Wayne County, ININ66,1691960+0%

337Boone County, IAIA26,7991960+1%

338Clayton County, IAIA16,8451960+1%

339Mahaska County, IAIA21,8801960+0%

340Palo Alto County, IAIA8,8991960+1%

341Greeley County, KSKS1,1821960+0%

342Labette County, KSKS19,6851960+0%

343Phillips County, KSKS4,7281960+0%

344Toole County, MTMT5,2111960+0%

345Jefferson County, PAPA43,2551960+0%

346Hardeman County, TXTX3,2921960+0%

347Emmons County, NDND3,2151961+1%

348Bay County, MIMI102,1231961+0%

349Buchanan County, MOMO83,5401961+0%

350Daniels County, MTMT1,6121961+1%

351McCone County, MTMT1,7201961+0%

352Sheridan County, MTMT3,4361961+0%

353Wibaux County, MTMT8851961+0%

354Albany County, NYNY321,2251961+0%

355Cattaraugus County, NYNY75,3901961+1%

356Rensselaer County, NYNY160,5101961+1%

357McHenry County, NDND5,1301961+1%

358Ransom County, NDND5,6171961+1%

359Ashtabula County, OHOH96,7131961+0%

360Clark County, OHOH135,3401961+0%

361Lucas County, OHOH423,3471961+0%

362Marion County, OHOH65,1151961+0%

363Woods County, OKOK8,4431961+0%

364Mercer County, PAPA107,8601961+0%

365Carson County, TXTX5,8051961−0%

366Fisher County, TXTX3,6921961+0%

367Potter County, TXTX114,4531961+0%

368Brooke County, WVWV21,1421961+0%

369Harrison County, WVWV64,2211961+0%

370Manitowoc County, WIWI81,7101961+0%

371Knox County, TXTX3,1921961+0%

372Hamilton County, OHOH838,4181961+0%

373Otero County, COCO17,6831961+1%

374LaSalle County, ILIL107,7731961+1%

375Mason County, ILIL12,4111961+0%

376Pike County, ILIL14,2311961+1%

377Whiteside County, ILIL54,1211961+0%

378Atchison County, KSKS16,1721961+1%

379Cowley County, KSKS34,3821961+1%

380Wyandotte County, KSKS170,5971961+0%

381Columbia County, WAWA4,1411961+1%

382Lycoming County, PAPA112,5871961+1%

383Roberts County, TXTX8671961+0%

384Divide County, NDND2,1101962+1%

385Bristol County, MAMA593,6401962+1%

386Calhoun County, MIMI133,4081962+0%

387Iron County, MIMI11,7571962+1%

388Keweenaw County, MIMI2,1861962+1%

389Ontonagon County, MIMI5,8231962+0%

390Norman County, MNMN6,3361962+1%

391St. Louis County, MNMN200,5181962+1%

392Sibley County, MNMN15,3561962+1%

393Worth County, MOMO1,9141962+1%

394Pondera County, MTMT6,0721962+0%

395Gage County, NENE21,7111962+0%

396Franklin County, NYNY46,5001962+1%

397Madison County, NYNY67,1201962+0%

398Onondaga County, NYNY466,5841962+0%

399St. Lawrence County, NYNY105,4881962+1%

400Steuben County, NYNY91,8551962+1%

401Burke County, NDND2,1321962+1%

402Towner County, NDND2,0401962+0%

403Ellis County, OKOK3,6131962+0%

404Erie County, PAPA265,8321962+0%

405Greene County, PAPA33,8851962+1%

406Mifflin County, PAPA46,1271962+0%

407Armstrong County, TXTX1,8431962+0%

408Swisher County, TXTX6,7031962+0%

409Danville, VAVA41,6471962+0%

410Lafayette County, WIWI17,4781962+1%

411Grant County, OKOK4,0671962+1%

412Wilbarger County, TXTX12,4811962+0%

413Tipton County, ININ15,3191962+0%

414Kiowa County, COCO1,4121962+0%

415Logan County, COCO20,6541962+0%

416Christian County, ILIL33,4431962+1%

417Hancock County, ILIL16,8031962+1%

418Fayette County, ININ23,5331962+0%

419Vermillion County, ININ15,4881962+1%

420Chickasaw County, IAIA11,6631962+1%

421Washington County, IAIA22,6671962+1%

422Wayne County, IAIA6,7381962+1%

423Anderson County, KSKS8,0181962+1%

424Bourbon County, KSKS14,3191962+1%

425Chautauqua County, KSKS3,3211962+1%

426Gove County, KSKS2,6311962+0%

427Logan County, KSKS2,6611962+0%

428Reno County, KSKS61,5391962+0%

429Martinsville, VAVA13,8491962+0%

430Foard County, TXTX1,0441962+1%

431Carroll County, MOMO8,4171963+1%

432Grant County, NDND2,2061963+0%

433Los Angeles County, CACA9,694,9341963+0%

434Norfolk County, MAMA739,7491963+0%

435Fillmore County, MNMN21,5401963+1%

436Kittson County, MNMN4,0311963+0%

437Lincoln County, MNMN5,5831963+1%

438Linn County, MOMO11,8151963+1%

439Schuyler County, MOMO4,1401963+0%

440Saline County, NENE14,9961963+1%

441Nelson County, NDND2,9631963+1%

442Traill County, NDND7,9201963+1%

443Columbiana County, OHOH99,3771963+0%

444Richland County, OHOH124,8931963+0%

445Trumbull County, OHOH198,9721963+0%

446Beaver County, OKOK4,8821963+0%

447Harper County, OKOK3,1721963+0%

448Kay County, OKOK43,4901963+0%

449Somerset County, PAPA72,0041963+0%

450Washington County, PAPA210,8021963+1%

451Day County, SDSD5,4841963+1%

452Faulk County, SDSD2,1781963+1%

453Haskell County, TXTX5,4991963+0%

454Lamb County, TXTX12,5791963+0%

455Sherman County, TXTX2,7811963+0%

456Crawford County, ILIL18,6481963+0%

457Crowley County, COCO5,6771963+1%

458De Witt County, ILIL15,1181963+1%

459Macon County, ILIL99,3001963+0%

460Marshall County, ILIL11,4731963+1%

461Montgomery County, ILIL28,0761963+1%

462Fountain County, ININ17,0131963+1%

463Appanoose County, IAIA12,0771963+0%

464Buena Vista County, IAIA20,4491963+1%

465Cedar County, IAIA18,3591963+1%

466Louisa County, IAIA10,4161963+0%

467Muscatine County, IAIA41,8531963+0%

468Winnebago County, IAIA10,2511963+0%

469Sheridan County, KSKS2,4271963+0%

470Wilson County, KSKS8,2991963+1%

471Yates County, NYNY24,5471963+1%

472Norfolk, VAVA231,0131963+0%

473Westmoreland County, PAPA349,3241963+0%

474Wheeler County, TXTX4,7731963+0%

475Eddy County, NDND2,3291964+1%

476Allegany County, NYNY46,8001964+1%

477Gratiot County, MIMI41,1901964+0%

478Murray County, MNMN7,9421964+1%

479Nobles County, MNMN22,3381964+1%

480Ramsey County, MNMN541,6231964+0%

481Custer County, MTMT12,0341964+0%

482Adams County, NENE31,0711964+1%

483Dodge County, NENE38,0571964+0%

484Grant County, NENE5611964+1%

485Knox County, NENE8,3351964+1%

486Thomas County, NENE6391964+0%

487Mercer County, NJNJ399,2891964+0%

488De Baca County, NMNM1,6471964+1%

489Union County, NMNM3,8441964+1%

490Chenango County, NYNY45,7151964+1%

491Monroe County, NYNY750,5061964+0%

492Logan County, NDND1,8591964+1%

493Allen County, OHOH100,8811964+0%

494Montgomery County, OHOH539,5981964+0%

495Wyandot County, OHOH21,5671964+1%

496Newport County, RIRI83,0511964+0%

497Moody County, SDSD6,6321964+1%

498Baylor County, TXTX3,4721964+0%

499Nolan County, TXTX14,1171964+0%

500Winkler County, TXTX7,5401964+0%

SHOWING 1–500 OF 3,134

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS

Frequently asked

Which county has the lowest median year built?

Kings County, New York ranks #1 with 0 (2020 Decennial Census).

What are the top 5 counties by median year built?

Kings County, New York, St. Louis, Missouri, Sioux County, Nebraska, Kalawao County, Hawaii, Lincoln County, Kansas.

How many counties are in this ranking?

3,134 counties qualify after filtering for population minimums and data availability. The ranking covers 2020 Decennial Census data.

How is median year built measured?

Median year that housing structures were built. Source: US Census Bureau, 2020 Decennial Census.