RANKING · 2010 CENSUS · 500 SHOWN OF 3,131

Oldest by median age, US counties · 2010

US counties ranked by median age of residents (2010 ACS). Sumter County, Florida leads at 62.7. 3,131 counties qualify in total. The top 25 average 54.3, against an all-counties median of 40.3.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

USUnited States308,745,53837.2–

01Sumter County, FLFL157,77262.7+27%

02Harding County, NMNM61755.9+15%

03Charlotte County, FLFL217,21255.9+3%

04Catron County, NMNM3,82755.8+17%

05Kalawao County, HIHI8255.3−6%

06Alcona County, MIMI10,55655.2+13%

07Llano County, TXTX23,35355.0+4%

08Sierra County, NMNM11,39554.5+11%

09Lancaster County, VAVA10,99554.1+9%

10Citrus County, FLFL171,66654.0+3%

11La Paz County, AZAZ16,71153.9+15%

12Jefferson County, WAWA33,97053.9+14%

13Prairie County, MTMT1,11253.6+10%

14Northumberland County, VAVA12,55753.6+7%

15Curry County, OROR22,62153.5+10%

16Sheridan County, NDND1,29653.4+11%

17Roscommon County, MIMI23,91453.3+13%

18Custer County, COCO5,59053.3+19%

19Mineral County, COCO91053.1+18%

20Hickory County, MOMO9,04453.0+7%

21Wheeler County, OROR1,47253.0+10%

22Esmeralda County, NVNV72952.9+17%

23Ontonagon County, MIMI5,82352.7+15%

24Loving County, TXTX5252.7+15%

25McIntosh County, NDND2,45152.7+3%

26San Juan County, WAWA18,57752.7+11%

27Highland County, VAVA2,31852.5+14%

28Sarasota County, FLFL479,95852.5+4%

29Jewell County, KSKS2,83052.5+14%

30Montmorency County, MIMI9,84252.3+11%

31Wahkiakum County, WAWA4,87352.3+18%

32Granite County, MTMT3,65852.1+22%

33Jeff Davis County, TXTX1,71152.0+22%

34Griggs County, NDND2,23951.9+13%

35Iron County, MIMI11,75751.9+14%

36Huerfano County, COCO7,01151.8+24%

37Grant County, NDND2,20651.7+11%

38Presque Isle County, MIMI13,12851.7+15%

39Aitkin County, MNMN16,25251.7+11%

40Keweenaw County, MIMI2,18651.6+15%

41Benton County, MOMO20,53651.5+11%

42Nelson County, NDND2,96351.5+9%

43Wells County, NDND3,72951.5+14%

44Highlands County, FLFL111,12251.5+3%

45Treasure County, MTMT72851.5+23%

46Divide County, NDND2,11051.4+5%

47Decatur County, KSKS2,71651.4+16%

48Hamilton County, NYNY5,00651.3+13%

49Rawlins County, KSKS2,43151.3+13%

50Towns County, GAGA13,28551.1+5%

51Iosco County, MIMI25,26651.0+15%

52Middlesex County, VAVA10,84151.0+9%

53Iron County, WIWI6,12751.0+13%

54Sierra County, CACA3,09850.9+16%

55McPherson County, SDSD2,34750.8+7%

56Pacific County, WAWA24,35750.8+11%

57Keya Paha County, NENE79250.7+21%

58Union County, GAGA27,85950.7+13%

59Vilas County, WIWI23,76150.7+11%

60Baxter County, ARAR42,98250.6+5%

61Potter County, SDSD2,37750.6+10%

62Republic County, KSKS4,64050.6+11%

63Emmons County, NDND3,21550.5+13%

64Storey County, NVNV4,26050.5+13%

65Wallowa County, OROR7,59550.5+14%

66Fall River County, SDSD7,46750.5+11%

67Real County, TXTX2,74550.5+13%

68Sabine County, TXTX10,01250.5+7%

69Daniels County, MTMT1,61250.4+7%

70Menard County, TXTX1,95650.4+14%

71Cavalier County, NDND3,49750.3+11%

72Leelanau County, MIMI22,98250.3+18%

73Sheridan County, MTMT3,43650.3+12%

74Garfield County, NENE1,71050.3+10%

75Towner County, NDND2,04050.3+14%

76Custer County, SDSD9,43150.3+16%

77Carter County, MTMT1,38350.2+20%

78Boyd County, NENE1,67450.2+15%

79Marion County, ARAR17,59350.1+14%

80Lake County, MIMI13,18250.1+16%

81Meagher County, MTMT2,13750.1+17%

82Hooker County, NENE68650.1+11%

83Campbell County, SDSD1,37750.1+20%

84Mathews County, VAVA8,52950.1+8%

85Grant County, OROR7,07550.0+20%

86McCormick County, SCSC10,21550.0+22%

87Ouray County, COCO5,26550.0+15%

88Adams County, IDID5,01350.0+13%

89Cheyenne County, KSKS2,60450.0+13%

90Barnstable County, MAMA233,53949.9+12%

91Stone County, MOMO32,50349.9+13%

92Rock County, NENE1,25949.9+15%

93Sullivan County, PAPA5,85649.9+16%

94Cook County, MNMN5,52249.8+13%

95Madison County, MTMT10,02649.8+15%

96Mineral County, MTMT5,18549.8+21%

97Sanders County, MTMT14,06249.8+13%

98Garden County, NENE1,80449.8+9%

99Logan County, NDND1,85949.8+7%

100McMullen County, TXTX54449.8+16%

101Oscoda County, MIMI8,72349.7+14%

102Gilliam County, OROR1,97149.7+16%

103Martin County, FLFL166,27249.7+5%

104Lemhi County, IDID8,47449.7+16%

105Plumas County, CACA18,58349.6+12%

106Clay County, NCNC12,23949.6+6%

107Lincoln County, OROR50,63649.6+12%

108Gillespie County, TXTX28,52749.6+7%

109Smith County, KSKS3,56649.6+8%

110Nuckolls County, NENE4,10049.5+12%

111Adams County, NDND2,27549.5+9%

112Lincoln County, NMNM19,84449.4+13%

113Hettinger County, NDND2,49249.4+7%

114Bayfield County, WIWI16,78749.4+17%

115Graham County, KSKS2,37149.4+11%

116Door County, WIWI30,61649.4+15%

117Powder River County, MTMT1,78149.3+17%

118Pawnee County, NENE2,51049.3+7%

119Mason County, TXTX3,99049.3+6%

120Trinity County, CACA15,72049.3+11%

121Trego County, KSKS2,74049.3+13%

122Yavapai County, AZAZ252,55249.2+11%

123Eddy County, NDND2,32949.2+12%

124Calaveras County, CACA46,60549.2+10%

125Mariposa County, CACA16,91849.2+15%

126Harlan County, NENE3,00049.2+11%

127Thayer County, NENE4,84249.2+12%

128Mineral County, NVNV4,40749.2+15%

129LaMoure County, NDND4,13549.2+14%

130Slope County, NDND62849.2+16%

131Adams County, WIWI21,75249.2+11%

132Sedgwick County, COCO2,24749.2+14%

133Musselshell County, MTMT5,58249.1+14%

134Polk County, NCNC20,53349.1+9%

135McLean County, NDND9,74049.1+11%

136Burnett County, WIWI17,22349.1+11%

137Indian River County, FLFL172,79949.1+4%

138Clearwater County, IDID9,11849.0+18%

139Mackinac County, MIMI11,23649.0+14%

140Wibaux County, MTMT88549.0+16%

141Aransas County, TXTX26,14649.0+15%

142Motley County, TXTX1,04349.0+10%

143Florence County, WIWI4,74849.0+17%

144Costilla County, COCO3,67949.0+16%

145Clallam County, WAWA78,20249.0+12%

146Garfield County, WAWA2,41649.0+14%

147Lac qui Parle County, MNMN6,70448.9+13%

148Lincoln County, MTMT22,32848.9+16%

149McCone County, MTMT1,72048.9+15%

150Ozark County, MOMO9,17248.9+12%

151Golden Valley County, MTMT84448.8+18%

152Transylvania County, NCNC34,21148.8+11%

153Haakon County, SDSD1,80248.8+18%

154Bandera County, TXTX22,87648.8+18%

155Elk County, KSKS2,45848.8+6%

156Lake of the Woods County, MNMN3,77048.7+17%

157Rush County, KSKS2,84548.7+9%

158Camden County, MOMO44,04748.6+8%

159Billings County, NDND1,07148.6+16%

160Noble County, OHOH14,27648.6+37%

161Jerauld County, SDSD1,65448.6+5%

162Kimble County, TXTX4,43848.6+13%

163Hot Springs County, WYWY4,60048.6+10%

164Big Stone County, MNMN5,05448.5+11%

165Perkins County, SDSD2,85348.5+13%

166Loup County, NENE57048.5+13%

167Franklin County, NENE2,79548.4+13%

168Nye County, NVNV57,33648.4+13%

169Kent County, TXTX67448.4+3%

170Marion County, TXTX9,89648.4+12%

171Archuleta County, COCO14,30648.4+19%

172Boise County, IDID8,54548.4+20%

173Coke County, TXTX3,41248.4+12%

174Schoolcraft County, MIMI8,18748.3+17%

175Lake County, MNMN10,74648.3+13%

176Deuel County, NENE1,86248.3+11%

177Carroll County, NHNH52,78448.3+14%

178Pamlico County, NCNC12,75848.3+13%

179Douglas County, SDSD2,88848.3+16%

180Price County, WIWI13,98848.3+16%

181Judith Basin County, MTMT2,16248.3+15%

182Cumberland County, TNTN66,30048.3+14%

183Fannin County, GAGA26,11148.3+12%

184Gove County, KSKS2,63148.3+13%

185Columbia County, WAWA4,14148.3+14%

186Amador County, CACA41,87648.2+13%

187Kittson County, MNMN4,03148.2+14%

188Grant County, NENE56148.2+21%

189Hitchcock County, NENE2,46748.2+11%

190Sherman County, OROR2,05148.2+15%

191Cameron County, PAPA4,21148.2+17%

192Gregory County, SDSD4,03748.2+9%

193Hand County, SDSD3,12148.2+11%

194Osborne County, KSKS3,28548.2+10%

195Chautauqua County, KSKS3,32148.2+8%

196Ness County, KSKS2,61748.2+10%

197Woodson County, KSKS3,11848.2+9%

198Worcester County, MDMD54,45948.1+12%

199St. Clair County, MOMO9,97648.1+10%

200Carbon County, MTMT11,46648.1+15%

201Banner County, NENE68648.1+21%

202Cherokee County, NCNC30,83048.1+9%

203Burke County, NDND2,13248.1+1%

204Dickinson County, IAIA18,07748.1+11%

205Lincoln County, MEME36,59548.1+13%

206Piscataquis County, MEME17,40948.1+14%

207Custer County, IDID4,63648.0+17%

208Bottineau County, NDND6,28448.0+11%

209Idaho County, IDID17,87448.0+13%

210Lewis County, IDID3,70448.0+13%

211Oneida County, WIWI38,13148.0+13%

212Gila County, AZAZ53,80147.9+13%

213Brown County, NENE2,82647.9+11%

214Dundy County, NENE1,56847.9+10%

215Baker County, OROR16,65847.9+12%

216Day County, SDSD5,48447.9+12%

217Lyon County, KYKY9,12347.9+15%

218Fergus County, MTMT11,82547.8+13%

219Sherman County, NENE2,92447.8+10%

220Sioux County, NENE1,18847.8+15%

221De Baca County, NMNM1,64747.8+9%

222Macon County, NCNC39,23247.8+6%

223Northampton County, VAVA11,87947.8+13%

224Calhoun County, IAIA9,56247.8+13%

225Pend Oreille County, WAWA14,45747.8+14%

226Stone County, ARAR12,70347.7+11%

227Crawford County, MIMI13,72247.7+17%

228Gladwin County, MIMI26,07747.7+13%

229Hayes County, NENE82147.7+12%

230Steele County, NDND1,79747.7+15%

231Hernando County, FLFL221,70147.7−4%

232Washburn County, WIWI17,08747.7+13%

233Mohave County, AZAZ228,10247.6+11%

234Nevada County, CACA101,91147.6+10%

235Ogemaw County, MIMI21,12147.6+13%

236Traverse County, MNMN3,13047.6+11%

237Oliver County, NDND1,89847.6+13%

238Nelson County, VAVA14,92047.6+11%

239Pocahontas County, IAIA6,81947.6+12%

240Lincoln County, WAWA11,98247.6+11%

241Tillamook County, OROR27,38447.5+9%

242Wood County, TXTX49,68847.5+10%

243Bath County, VAVA4,07647.5+14%

244Rappahannock County, VAVA7,43947.5+12%

245Platte County, WYWY8,63447.5+15%

246Flagler County, FLFL140,36047.5−6%

247Monona County, IAIA8,53947.5+10%

248Talbot County, MDMD38,23847.4+9%

249Antrim County, MIMI24,69847.4+15%

250Worth County, MOMO1,91447.4+13%

251Furnas County, NENE4,52447.4+9%

252Douglas County, NVNV50,11147.4+14%

253Brunswick County, NCNC174,70247.4+12%

254Lake County, OROR8,18747.4+11%

255Essex County, VTVT6,05147.4+22%

256Baca County, COCO3,34747.4+10%

257Chaffee County, COCO20,83147.4+13%

258Kiowa County, COCO1,41247.4+19%

259Comanche County, KSKS1,67347.4+1%

260Marquette County, WIWI15,92747.4+16%

261Izard County, ARAR14,40547.3+11%

262Alger County, MIMI8,64147.3+15%

263Petroleum County, MTMT54847.3+15%

264Keith County, NENE8,10047.3+15%

265Coos County, OROR63,99247.3+10%

266Josephine County, OROR87,86747.3+10%

267Kerr County, TXTX54,03747.3+8%

268Trinity County, TXTX14,38447.3+9%

269Pendleton County, WVWV5,82647.3+15%

270Tuolumne County, CACA53,16047.3+10%

271Jackson County, COCO1,21147.3+17%

272Marion County, FLFL442,66047.3+8%

273Ferry County, WAWA7,51747.3+18%

274Webster County, NENE3,33647.2+7%

275Kidder County, NDND2,39347.2+6%

276Walworth County, SDSD5,21747.2+10%

277Pickett County, TNTN5,21947.2+13%

278Edwards County, TXTX1,37047.2+21%

279Henderson County, ILIL5,98447.2+15%

280Sawyer County, WIWI18,84647.2+12%

281Morris County, KSKS5,34847.2+12%

282Cheboygan County, MIMI25,79347.1+14%

283Manistee County, MIMI25,65647.1+13%

284Kingsbury County, SDSD5,28447.1+10%

285Sanborn County, SDSD2,38847.1+15%

286Cottle County, TXTX1,22447.1+7%

287San Augustine County, TXTX7,72247.1+12%

288Pocahontas County, WVWV7,60247.1+12%

289Richardson County, NENE7,53047.1+14%

290Cape May County, NJNJ93,39047.1+11%

291Hinsdale County, COCO75347.1+7%

292Jo Daviess County, ILIL21,59447.1+13%

293Burt County, NENE6,67847.1+12%

294Gosper County, NENE1,80347.1+9%

295Fulton County, ARAR12,49247.0+9%

296Sharp County, ARAR18,12247.0+6%

297McIntosh County, OKOK19,75847.0+7%

298Baylor County, TXTX3,47247.0+5%

299Siskiyou County, CACA42,01347.0+9%

300Teller County, COCO24,75647.0+19%

301Audubon County, IAIA5,50947.0+11%

302Cherokee County, IAIA11,36947.0+13%

303Haines, AKAK2,06846.9+15%

304Park County, COCO18,31446.9+17%

305Cass County, MNMN31,43046.9+11%

306Valley County, NENE4,09446.9+8%

307Bowman County, NDND2,76246.9+9%

308Pierce County, NDND3,83846.9+9%

309Faulk County, SDSD2,17846.9+13%

310Jones County, SDSD91346.9+14%

311Collier County, FLFL417,13146.9+6%

312Valley County, IDID12,83146.9+8%

313Sheridan County, KSKS2,42746.9+13%

314Cleburne County, ARAR25,67246.8+7%

315Montgomery County, ARAR8,57946.8+13%

316Searcy County, ARAR7,84846.8+11%

317Gogebic County, MIMI14,28546.8+9%

318Huron County, MIMI30,53046.8+14%

319Murray County, MNMN7,94246.8+10%

320Phillips County, MTMT4,20346.8+15%

321Jefferson County, NENE7,07046.8+9%

322Hutchinson County, SDSD7,41346.8+9%

323Patrick County, VAVA17,42446.8+16%

324Wrangell, AKAK2,00746.7–

325Foster County, NDND3,21246.7+15%

326Alpine County, CACA1,04346.7+19%

327Arenac County, MIMI15,06846.7+16%

328Thomas County, NENE63946.7+6%

329Colfax County, NMNM12,18446.7+14%

330Pembina County, NDND6,56846.7+12%

331Blanco County, TXTX13,58146.7+13%

332Hamilton County, TXTX8,68046.7+8%

333Grayson County, VAVA15,23046.7+15%

334Greenwood County, KSKS5,82646.7+10%

335Brown County, ININ15,77746.7+14%

336Adams County, IAIA3,61746.7+11%

337Foard County, TXTX1,04446.7+12%

338Van Buren County, ARAR16,23846.6+5%

339Holt County, MOMO4,20046.6+11%

340Antelope County, NENE6,35246.6+15%

341Knox County, NENE8,33546.6+8%

342Sully County, SDSD1,47946.6+17%

343Throckmorton County, TXTX1,55446.6+11%

344Charles City County, VAVA6,62346.6+17%

345Westmoreland County, VAVA19,71546.6+9%

346Clear Creek County, COCO8,99446.6+16%

347Pope County, ILIL3,67246.6+13%

348Kossuth County, IAIA14,32246.6+13%

349Sac County, IAIA9,52546.6+11%

350Greeley County, KSKS1,18246.6+21%

351Sweet Grass County, MTMT3,76246.6+13%

352Carroll County, ILIL15,41946.5+14%

353Grant County, MNMN6,08546.5+9%

354Rockbridge County, VAVA22,66346.5+15%

355Russell County, KSKS6,58146.5+5%

356Hubbard County, MNMN22,36946.4+11%

357Koochiching County, MNMN11,58746.4+12%

358Garfield County, MTMT1,14846.4+12%

359Coos County, NHNH31,34346.4+12%

360Perquimans County, NCNC13,49046.4+10%

361Hyde County, SDSD1,19146.4+10%

362Miner County, SDSD2,28146.4+9%

363Fayette County, TXTX25,45946.4+9%

364Quitman County, GAGA2,25446.4+10%

365Greeley County, NENE2,15446.4+11%

366Monroe County, FLFL80,40646.4+9%

367Greene County, GAGA21,36746.4+19%

368Lincoln County, KSKS2,86146.4+6%

369Washington County, KSKS5,53346.4+6%

370Valley County, MTMT7,38546.4+11%

371Hancock County, MEME57,17146.3+14%

372Otter Tail County, MNMN61,04146.3+13%

373Fillmore County, NENE5,45846.3+12%

374Ottawa County, OHOH39,48146.3+13%

375Stonewall County, TXTX1,18646.3+6%

376Tucker County, WVWV6,54046.3+10%

377Mercer County, NDND8,44146.3+15%

378Pinellas County, FLFL948,56346.3+8%

379Hardin County, ILIL3,58846.3+10%

380Coleman County, TXTX7,91546.3+8%

381Knox County, MEME41,11746.2+12%

382Benzie County, MIMI18,56846.2+13%

383Menominee County, MIMI22,94146.2+14%

384Lincoln County, MNMN5,58346.2+7%

385Atchison County, MOMO5,17546.2+11%

386McHenry County, NDND5,13046.2+7%

387Armstrong County, TXTX1,84346.2+14%

388Waushara County, WIWI25,22346.2+10%

389Jefferson County, MTMT13,32946.2+15%

390Shoshone County, IDID14,13046.2+11%

391Modoc County, CACA8,42646.1+10%

392Lane County, KSKS1,50846.1+11%

393Morgan County, MOMO22,41846.1+8%

394Holt County, NENE10,06746.1+14%

395Wheeler County, NENE78946.1+14%

396Douglas County, OROR111,95146.1+12%

397Niobrara County, WYWY2,34146.1+8%

398Blaine County, NENE45846.1+16%

399Sheridan County, NENE4,80946.1+10%

400Hodgeman County, KSKS1,61946.1+16%

401Washington County, MEME31,33446.1+14%

402Hoonah-Angoon Census Area, AKAK2,27146.0–

403Newton County, ARAR7,02646.0+15%

404Faribault County, MNMN13,88846.0+8%

405Deer Lodge County, MTMT9,70946.0+9%

406Ravalli County, MTMT48,58246.0+12%

407Kimball County, NENE3,39146.0+7%

408Mora County, NMNM4,05146.0+16%

409Alfalfa County, OKOK5,64946.0+9%

410Loudon County, TNTN63,76446.0+12%

411Borden County, TXTX56746.0+14%

412Dade County, MOMO7,80445.9+10%

413Pope County, MNMN11,42045.9+9%

414Grant County, NMNM27,25245.9+18%

415Alleghany County, NCNC11,47945.9+7%

416Sargent County, NDND3,71145.9+14%

417Walsh County, NDND10,17945.9+12%

418Wayne County, PAPA51,70345.9+13%

419Hood County, TXTX70,50145.9+11%

420Golden Valley County, NDND1,80845.9+11%

421Taliaferro County, GAGA1,66245.9+14%

422Chariton County, MOMO7,37745.8+8%

423Teton County, MTMT6,49645.8+14%

424Rabun County, GAGA17,76445.8+9%

425Wayne County, MOMO10,78245.8+8%

426Carteret County, NCNC70,46945.8+8%

427Rains County, TXTX13,54245.8+12%

428Windsor County, VTVT57,31245.8+11%

429Alleghany County, VAVA14,54645.8+11%

430Mecklenburg County, VAVA30,74745.8+12%

431Rusk County, WIWI14,14645.8+14%

432Grant County, OKOK4,06745.8+11%

433Barber County, KSKS4,08345.8+8%

434Clay County, GAGA2,81545.8+9%

435Bonner County, IDID54,42045.8+12%

436Mitchell County, NCNC15,06245.7+9%

437Clark County, SDSD4,03145.7+10%

438Edmunds County, SDSD4,02245.7+10%

439Briscoe County, TXTX1,47445.7+15%

440Fisher County, TXTX3,69245.7+7%

441Goliad County, TXTX7,20845.7+14%

442Leon County, TXTX16,89445.7+9%

443Mills County, TXTX4,58045.7+3%

444Summers County, WVWV11,53245.7+5%

445Langlade County, WIWI19,53445.7+13%

446Manatee County, FLFL468,20045.7+5%

447Stillwater County, MTMT9,44545.7+12%

448Marinette County, WIWI42,57445.7+13%

449Inyo County, CACA18,15845.6+7%

450Delta County, COCO32,17845.6+8%

451Alpena County, MIMI28,85345.6+13%

452Delta County, MIMI36,58245.6+13%

453Quay County, NMNM8,45445.6+10%

454Crook County, OROR27,56445.6+18%

455Greene County, IAIA8,65845.6+11%

456Talbot County, GAGA5,70945.6+15%

457Gilpin County, COCO6,07345.6+19%

458Lake County, FLFL456,06845.6+1%

459Lee County, FLFL875,60745.6+1%

460Ringgold County, IAIA4,64245.6+6%

461Chase County, KSKS2,57245.6+13%

462Mitchell County, KSKS5,59045.6+11%

463Stafford County, KSKS4,00545.6+11%

464Kent County, MDMD19,56545.6+10%

465Haywood County, NCNC63,36945.6+8%

466Charlevoix County, MIMI26,03645.5+16%

467Martin County, MNMN19,44045.5+10%

468Boone County, NENE5,35545.5+14%

469Ashe County, NCNC27,51445.5+8%

470Northampton County, NCNC16,49145.5+14%

471Yancey County, NCNC19,08445.5+9%

472Benton County, TNTN16,18345.5+9%

473Grand Isle County, VTVT7,51145.5+13%

474Brevard County, FLFL663,98245.5+10%

475Dickinson County, MIMI25,82745.4+13%

476Itasca County, MNMN45,40445.4+10%

477Oregon County, MOMO8,70945.4+11%

478Broadwater County, MTMT8,49345.4+10%

479Park County, MTMT18,21445.4+12%

480Custer County, NENE10,50045.4+10%

481Delaware County, NYNY44,30545.4+10%

482Georgetown County, SCSC65,91245.4+16%

483Renville County, NDND2,33145.4+4%

484Sussex County, DEDE277,14045.4+10%

485Dixie County, FLFL18,03845.4+12%

486Shelby County, IAIA11,68945.4+12%

487Wallace County, KSKS1,44145.4+15%

488Cherry County, NENE5,56145.4+15%

489Henderson County, NCNC122,37545.4+6%

490Aroostook County, MEME66,60945.3+11%

491Dukes County, MAMA21,21945.3+11%

492Clare County, MIMI31,54345.3+12%

493Columbia County, NYNY60,16845.3+12%

494Tripp County, SDSD5,70845.3+15%

495Kinney County, TXTX3,12845.3+5%

496Hancock County, WVWV27,72945.3+9%

497Polk County, NENE5,27045.3+9%

498Volusia County, FLFL606,57345.3+7%

499Adair County, IAIA7,40345.3+8%

500Wayne County, IAIA6,73845.3+5%

SHOWING 1–500 OF 3,131

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Download CSV (full list, 3,131 rows)

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

Frequently asked

Which county has the highest median age?

Sumter County, Florida ranks #1 with 62.7 (2010 Decennial Census).

What are the top 5 counties by median age?

Sumter County, Florida, Harding County, New Mexico, Charlotte County, Florida, Catron County, New Mexico, Kalawao County, Hawaii.

How many counties are in this ranking?

3,131 counties qualify after filtering for population minimums and data availability. The ranking covers 2010 Decennial Census data.

How is median age measured?

Median age of all residents. Source: US Census Bureau, 2010 Decennial Census.