Which county has the lowest median age?

Madison County, Idaho ranks #1 with 20.7 (2000 Decennial Census).

What are the top 5 counties by median age?

Madison County, Idaho, Todd County, South Dakota, Harrisonburg, Virginia, Williamsburg, Virginia, Radford, Virginia.

How many counties are in this ranking?

3,125 counties qualify after filtering for population minimums and data availability. The ranking covers 2000 Decennial Census data.

How is median age measured?

Median age of all residents. Source: US Census Bureau, 2000 Decennial Census.

RANKING · 2000 CENSUS · 125 SHOWN OF 3,125

Youngest by median age, US counties · 2000

US counties with the youngest median age (2000 ACS).

Flip the list · Oldest by median age, US counties →

All statesAll rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 1990

3001McLean County, NDND9,74044.1+18%

3002McIntosh County, OKOK19,75844.1+5%

3003Lincoln County, OROR50,63644.1+11%

3004Menard County, TXTX1,95644.1+6%

3005Burnett County, WIWI17,22344.1+13%

3006Collier County, FLFL417,13144.1+8%

3007Russell County, KSKS6,58144.1+9%

3008Woodson County, KSKS3,11844.1+5%

3009Van Buren County, ARAR16,23844.2+1%

3010Plumas County, CACA18,58344.2+13%

3011Iosco County, MIMI25,26644.2+36%

3012Sanders County, MTMT14,06244.2+20%

3013Thomas County, NENE63944.2+23%

3014Webster County, NENE3,33644.2+2%

3015Cheyenne County, KSKS2,60444.2+6%

3016Forest County, PAPA6,61444.2+8%

3017Hot Springs County, WYWY4,60044.2+16%

3018Sharp County, ARAR18,12244.3−2%

3019Decatur County, KSKS2,71644.3+11%

3020Gregory County, SDSD4,03744.3+16%

3021Wallowa County, OROR7,59544.4+18%

3022Mills County, TXTX4,58044.4+4%

3023Wahkiakum County, WAWA4,87344.4+11%

3024Motley County, TXTX1,04344.4+5%

3025Adams County, IDID5,01344.4+23%

3026Graham County, KSKS2,37144.4+14%

3027Yavapai County, AZAZ252,55244.5+5%

3028Emmons County, NDND3,21544.5+11%

3029Harlan County, NENE3,00044.5+8%

3030Storey County, NVNV4,26044.5+19%

3031Kidder County, NDND2,39344.5+16%

3032Adams County, WIWI21,75244.5+10%

3033Calaveras County, CACA46,60544.6+12%

3034Barnstable County, MAMA233,53944.6+13%

3035Real County, TXTX2,74544.6+4%

3036Trinity County, CACA15,72044.6+18%

3037Rush County, KSKS2,84544.6+4%

3038Chautauqua County, KSKS3,32144.7+2%

3039Baylor County, TXTX3,47244.8+3%

3040Union County, GAGA27,85944.8+15%

3041Keweenaw County, MIMI2,18644.9−3%

3042Polk County, NCNC20,53344.9+5%

3043Custer County, COCO5,59044.9+14%

3044Pasco County, FLFL674,51644.9−7%

3045Mineral County, COCO91045.0+20%

3046Iron County, WIWI6,12745.0+6%

3047Presque Isle County, MIMI13,12845.1+17%

3048Sheridan County, MTMT3,43645.1+14%

3049Lake County, FLFL456,06845.1+1%

3050Esmeralda County, NVNV72945.1+25%

3051Cavalier County, NDND3,49745.2+17%

3052Camden County, MOMO44,04745.2+9%

3053Macon County, NCNC39,23245.2+5%

3054Wells County, NDND3,72945.2+7%

3055Lee County, FLFL875,60745.2+7%

3056Hooker County, NENE68645.3+4%

3057Ellis County, OKOK3,61345.3+15%

3058Iron County, MIMI11,75745.4+4%

3059Hamilton County, NYNY5,00645.4+14%

3060Rawlins County, KSKS2,43145.4+18%

3061Fall River County, SDSD7,46745.5+9%

3062Garden County, NENE1,80445.6+8%

3063Adams County, NDND2,27545.6+16%

3064Republic County, KSKS4,64045.7+4%

3065Griggs County, NDND2,23945.8+12%

3066Potter County, SDSD2,37745.8+17%

3067Loving County, TXTX5245.8+35%

3068Pacific County, WAWA24,35745.8+13%

3069Vilas County, WIWI23,76145.8+6%

3070Ontonagon County, MIMI5,82345.9+14%

3071Garfield County, NENE1,71045.9+12%

3072Pawnee County, NENE2,51045.9+4%

3073Highland County, VAVA2,31846.0+13%

3074Elk County, KSKS2,45846.0−1%

3075Smith County, KSKS3,56646.0+1%

3076Hettinger County, NDND2,49246.2+13%

3077Mathews County, VAVA8,52946.2+3%

3078Jewell County, KSKS2,83046.2+9%

3079Benton County, MOMO20,53646.3+4%

3080Jerauld County, SDSD1,65446.3+12%

3081Gillespie County, TXTX28,52746.3+10%

3082Logan County, NDND1,85946.4+7%

3083Grant County, NDND2,20646.5+18%

3084Aitkin County, MNMN16,25246.5+9%

3085Clay County, NCNC12,23946.7+17%

3086Mason County, TXTX3,99046.7+9%

3087La Paz County, AZAZ16,71146.8+29%

3088Middlesex County, VAVA10,84146.8+9%

3089Comanche County, KSKS1,67346.9+12%

3090Montmorency County, MIMI9,84247.0+15%

3091Daniels County, MTMT1,61247.0+14%

3092Sabine County, TXTX10,01247.0+4%

3093Indian River County, FLFL172,79947.0+7%

3094Kent County, TXTX67447.1+16%

3095Jefferson County, WAWA33,97047.1+15%

3096Roscommon County, MIMI23,91447.2+6%

3097Nelson County, NDND2,96347.2+4%

3098Martin County, FLFL166,27247.3+7%

3099San Juan County, WAWA18,57747.4+9%

3100Burke County, NDND2,13247.5+12%

3101McPherson County, SDSD2,34747.6+2%

3102Catron County, NMNM3,82747.8+27%

3103Baxter County, ARAR42,98248.1+1%

3104Sheridan County, NDND1,29648.1+14%

3105Wheeler County, OROR1,47248.1+11%

3106Towns County, GAGA13,28548.6+13%

3107Harding County, NMNM61748.7+28%

3108Curry County, OROR22,62148.8+11%

3109Prairie County, MTMT1,11248.9+13%

3110Sierra County, NMNM11,39548.9−5%

3111Divide County, NDND2,11049.0+11%

3112Alcona County, MIMI10,55649.0+8%

3113Sumter County, FLFL157,77249.2+23%

3114Hernando County, FLFL221,70149.5−0%

3115Hickory County, MOMO9,04449.7−2%

3116Lancaster County, VAVA10,99549.8+10%

3117Highlands County, FLFL111,12250.0−3%

3118Northumberland County, VAVA12,55750.1+12%

3119Flagler County, FLFL140,36050.4+9%

3120Sarasota County, FLFL479,95850.5+3%

3121McIntosh County, NDND2,45151.0+4%

3122Citrus County, FLFL171,66652.6+4%

3123Llano County, TXTX23,35353.0−5%

3124Charlotte County, FLFL217,21254.3+1%

3125Kalawao County, HIHI8258.6−6%

SHOWING 3,001–3,125 OF 3,125

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