Which county has the highest median age?

Sumter County, Florida ranks #1 with 68.5 (2020 American Community Survey).

What are the top 5 counties by median age?

Sumter County, Florida, Catron County, New Mexico, Charlotte County, Florida, Jefferson County, Washington, Lancaster County, Virginia.

How many counties are in this ranking?

3,135 counties qualify after filtering for population minimums and data availability. The ranking covers 2020 ACS 5-year data.

How is median age measured?

Median age of all residents. Source: US Census Bureau, American Community Survey 5-year estimates (2020).

RANKING · 2020 CENSUS · 135 SHOWN OF 3,135

Oldest by median age, US counties · 2020

US counties ranked by median age of residents (2023 ACS).

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

All statesAll rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

3001Duchesne County, UTUT20,85633.3+18%

3002Roosevelt County, MTMT10,24233.2+3%

3003Benton County, OROR97,72833.2+7%

3004Midland County, TXTX187,85533.2−3%

3005Manassas Park, VAVA16,56033.2+10%

3006Custer County, OKOK28,17533.1+1%

3007Leon County, FLFL299,04833.1+12%

3008Bonneville County, IDID135,77133.1+4%

3009Cassia County, IDID26,39733.1+6%

3010Benson County, NDND5,75933.0+5%

3011Deaf Smith County, TXTX18,62633.0+8%

3012Lubbock County, TXTX328,90633.0+8%

3013Frio County, TXTX18,82333.0+7%

3014Waller County, TXTX69,85833.0+10%

3015Box Elder County, UTUT65,32033.0+18%

3016Tuscaloosa County, ALAL241,36832.9+3%

3017Kings County, CACA154,32732.9+9%

3018Weber County, UTUT278,17432.9+12%

3019Salt Lake County, UTUT1,220,91632.9+14%

3020Kern County, CACA927,06832.8+7%

3021Vernon Parish, LALA45,09132.8+16%

3022Glacier County, MTMT13,46332.8+7%

3023Curry County, NMNM46,65532.8+6%

3024Ward County, NDND68,23332.8+1%

3025Ector County, TXTX173,80132.8+2%

3026Zapata County, TXTX13,75332.8+7%

3027Lowndes County, GAGA122,86732.8+9%

3028Bell County, TXTX402,24832.7+12%

3029Rowan County, KYKY24,47632.7+10%

3030Elmore County, IDID29,46532.7+12%

3031Fairbanks North Star, AKAK93,97232.6+11%

3032Coconino County, AZAZ144,36832.5+10%

3033Andrews County, TXTX18,91432.5−5%

3034Texas County, OKOK20,32232.4+7%

3035Dewey County, SDSD5,41932.4+22%

3036Richmond, VAVA237,25732.4−4%

3037Suffolk County, MAMA791,89132.3+2%

3038Blue Earth County, MNMN70,63432.3+8%

3039Lea County, NMNM74,74932.3−2%

3040Bennett County, SDSD3,30732.3+11%

3041Dallam County, TXTX7,50832.3+3%

3042Hays County, TXTX304,39032.3+14%

3043Tulare County, CACA485,14632.3+11%

3044Kleberg County, TXTX30,31532.2+10%

3045Douglas County, KSKS120,92032.2+21%

3046Alachua County, FLFL290,02832.2+11%

3047Lake and Peninsula, AKAK1,35732.1+10%

3048Johnson County, MOMO56,67032.1+13%

3049Jefferson County, IDID35,29732.1+11%

3050Washington County, ARAR271,21332.0+4%

3051Merced County, CACA297,26032.0+10%

3052Boone County, MOMO191,74631.9+8%

3053Moore County, TXTX21,89131.9+5%

3054Starr County, TXTX66,31931.9+22%

3055Long County, GAGA21,55731.8+20%

3056Finney County, KSKS37,50531.8+13%

3057Roosevelt County, NMNM18,61531.8+8%

3058Isabella County, MIMI64,69131.7+26%

3059Williams County, NDND41,76731.6−21%

3060Coryell County, TXTX85,59231.6+14%

3061Fredericksburg, VAVA30,39331.6+4%

3062Norfolk, VAVA231,01331.6+7%

3063Big Horn County, MTMT12,75231.5+6%

3064Centre County, PAPA157,39331.5+10%

3065Erath County, TXTX43,91131.5+0%

3066Uintah County, UTUT38,27831.5+9%

3067Lee County, ALAL189,88131.4+14%

3068Grand Forks County, NDND74,50131.4+8%

3069Tooele County, UTUT87,46131.4+16%

3070Davis County, UTUT381,22731.4+17%

3071Dillingham Census Area, AKAK4,48331.3+8%

3072Montgomery County, TNTN249,93531.3+4%

3073Ford County, KSKS33,99331.3+5%

3074Johnson County, IAIA160,04431.2+10%

3075Holmes County, OHOH44,97031.1+11%

3076Hidalgo County, TXTX921,54931.1+14%

3077Monongalia County, WVWV107,99131.1+2%

3078Latah County, IDID41,84231.0+11%

3079Monroe County, ININ143,34531.0+12%

3080Tompkins County, NYNY104,04731.0+8%

3081Lynchburg, VAVA81,34731.0−12%

3082McKenzie County, NDND15,19230.9−22%

3083Franklin County, WAWA102,61230.9+10%

3084Champaign County, ILIL209,97230.8+8%

3085LaGrange County, ININ41,30530.8+4%

3086Seward County, KSKS21,07330.8+6%

3087Juab County, UTUT13,56730.7+16%

3088Webb County, TXTX281,22430.6+15%

3089Adair County, MOMO25,68430.5+9%

3090Corson County, SDSD3,78130.5+8%

3091Lafayette County, MSMS59,59730.2+12%

3092Christian County, KYKY70,11530.0+8%

3093Lincoln Parish, LALA48,36029.9+13%

3094Sioux County, NDND3,66729.9+25%

3095Nome Census Area, AKAK9,83029.8+8%

3096Thurston County, NENE6,75229.7−0%

3097Brookings County, SDSD37,63529.7+12%

3098Wayne County, NENE10,02029.7+6%

3099Adams County, WAWA21,48829.7+0%

3100Tippecanoe County, ININ190,45629.6+9%

3101Athens County, OHOH63,19729.5+15%

3102Charlottesville, VAVA44,38829.5+15%

3103Watauga County, NCNC54,78629.4−2%

3104Payne County, OKOK83,88929.2+6%

3105Albany County, WYWY38,55829.1+9%

3106Liberty County, GAGA70,31329.0+16%

3107Ziebach County, SDSD2,38928.9+21%

3108Iron County, UTUT67,14128.9+19%

3109Bulloch County, GAGA86,94928.9+11%

3110Geary County, KSKS36,33828.7−1%

3111Onslow County, NCNC217,17528.3+13%

3112Clarke County, GAGA129,92128.3+11%

3113Gaines County, TXTX23,95628.2−5%

3114Northwest Arctic, AKAK7,09528.0+17%

3115Bethel Census Area, AKAK18,39127.6+9%

3116Montgomery County, VAVA98,43427.5+6%

3117Oktibbeha County, MSMS51,89627.3+10%

3118Pulaski County, MOMO54,44227.3−4%

3119Story County, IAIA101,29126.9+2%

3120Cache County, UTUT145,00026.3+10%

3121Brazos County, TXTX249,08826.0+10%

3122Utah County, UTUT759,85925.9+11%

3123Buffalo County, SDSD1,80225.8+10%

3124Oglala Lakota County, SDSD13,33825.7–

3125Whitman County, WAWA48,51225.6+4%

3126Riley County, KSKS72,59825.3+6%

3127Clay County, SDSD15,03125.1+1%

3128Todd County, SDSD8,86325.1+16%

3129Williamsburg, VAVA15,86124.0+6%

3130Chattahoochee County, GAGA8,46523.8+3%

3131Kusilvak Census Area, AKAK7,93223.7–

3132Harrisonburg, VAVA50,83923.5+4%

3133Radford, VAVA17,24323.5+3%

3134Madison County, IDID55,17223.1+12%

3135Lexington, VAVA7,76922.7−3%

SHOWING 3,001–3,135 OF 3,135

1 2 3 4 5 6 7

Download CSV (full list, 3,135 rows)

UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES