Which county has the lowest median age?

Madison County, Idaho ranks #1 with 21.4 (2024 American Community Survey).

What are the top 5 counties by median age?

Madison County, Idaho, Lexington, Virginia, Buffalo County, South Dakota, Radford, Virginia, Kusilvak Census Area, Alaska.

How many counties are in this ranking?

3,144 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year data.

How is median age measured?

Median age of all residents. Source: US Census Bureau, American Community Survey 5-year estimates (2024).

RANKING · 2024 ACS · 144 SHOWN OF 3,144

Youngest by median age, US counties

US counties with the youngest median age (2023 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 2000

3001Patrick County, VAVA17,42451.8+28%

3002Cape May County, NJNJ93,39051.8+22%

3003McIntosh County, GAGA11,98951.8+40%

3004Essex County, VTVT6,05151.9+33%

3005Sussex County, DEDE277,14051.9+26%

3006Calaveras County, CACA46,60552.0+17%

3007Plumas County, CACA18,58352.0+18%

3008Northampton County, NCNC16,49152.0+30%

3009Treasure County, MTMT72852.0+24%

3010Archuleta County, COCO14,30652.1+28%

3011Clallam County, WAWA78,20252.1+19%

3012Clearwater County, IDID9,11852.2+25%

3013Cheboygan County, MIMI25,79352.2+26%

3014Madison County, MTMT10,02652.2+20%

3015Boyd County, NENE1,67452.2+19%

3016Georgetown County, SCSC65,91252.2+34%

3017Teller County, COCO24,75652.2+32%

3018Stonewall County, TXTX1,18652.3+20%

3019Motley County, TXTX1,04352.3+18%

3020Lincoln County, NMNM19,84452.4+20%

3021Oscoda County, MIMI8,72352.5+20%

3022Nye County, NVNV57,33652.5+22%

3023Northampton County, VAVA11,87952.5+24%

3024Schoolcraft County, MIMI8,18752.6+27%

3025Alleghany County, NCNC11,47952.6+22%

3026Charles City County, VAVA6,62352.6+32%

3027Price County, WIWI13,98852.6+26%

3028Taos County, NMNM34,56452.6+33%

3029Lincoln County, OROR50,63652.7+20%

3030Mason County, TXTX3,99052.7+13%

3031Oneida County, WIWI38,13152.7+24%

3032Washburn County, WIWI17,08752.7+25%

3033Lincoln County, MTMT22,32852.8+25%

3034Storey County, NVNV4,26052.8+19%

3035Sawyer County, WIWI18,84652.8+25%

3036Ferry County, WAWA7,51752.9+32%

3037Mackinac County, MIMI11,23653.0+24%

3038Cook County, MNMN5,52253.0+20%

3039Granite County, MTMT3,65853.0+24%

3040Cameron County, PAPA4,21153.0+28%

3041McIntosh County, NDND2,45153.0+4%

3042Iron County, MIMI11,75753.1+17%

3043Flagler County, FLFL140,36053.1+5%

3044Greene County, GAGA21,36753.1+36%

3045Camden County, MOMO44,04753.2+18%

3046McCone County, MTMT1,72053.2+25%

3047Thomas County, NENE63953.3+21%

3048Collier County, FLFL417,13153.3+21%

3049Martin County, FLFL166,27253.3+13%

3050Lemhi County, IDID8,47453.3+25%

3051Daniels County, MTMT1,61253.4+14%

3052Noble County, OHOH14,27653.4+50%

3053Boise County, IDID8,54553.4+32%

3054Iosco County, MIMI25,26653.5+21%

3055Cherokee County, NCNC30,83053.5+22%

3056Cumberland County, TNTN66,30053.5+26%

3057Bandera County, TXTX22,87653.5+30%

3058Mohave County, AZAZ228,10253.6+25%

3059Hardin County, ILIL3,58853.6+27%

3060Hyde County, SDSD1,19153.7+27%

3061Adams County, IDID5,01353.9+21%

3062Pope County, ILIL3,67253.9+31%

3063Fannin County, GAGA26,11154.0+25%

3064Pamlico County, NCNC12,75854.1+26%

3065Slope County, NDND62854.1+27%

3066Sabine County, TXTX10,01254.2+15%

3067Wheeler County, NENE78954.3+34%

3068Door County, WIWI30,61654.3+27%

3069Highlands County, FLFL111,12254.4+9%

3070Benton County, MOMO20,53654.5+18%

3071Wahkiakum County, WAWA4,87354.5+23%

3072Stone County, MOMO32,50354.6+24%

3073Sanders County, MTMT14,06254.6+24%

3074Carroll County, NHNH52,78454.6+28%

3075Bayfield County, WIWI16,78754.6+30%

3076Sierra County, CACA3,09854.7+25%

3077Kenedy County, TXTX31954.8+60%

3078Polk County, NCNC20,53354.9+22%

3079Niobrara County, WYWY2,34154.9+28%

3080Trinity County, CACA15,72054.9+23%

3081Douglas County, NVNV50,11155.0+32%

3082Clay County, NCNC12,23955.0+18%

3083Mathews County, VAVA8,52955.0+19%

3084Esmeralda County, NVNV72955.0+22%

3085Pacific County, WAWA24,35755.0+20%

3086Yavapai County, AZAZ252,55255.1+24%

3087Mora County, NMNM4,05155.1+39%

3088Hickory County, MOMO9,04455.2+11%

3089Fall River County, SDSD7,46755.3+22%

3090Florence County, WIWI4,74855.3+32%

3091Huerfano County, COCO7,01155.3+33%

3092Indian River County, FLFL172,79955.3+18%

3093Barnstable County, MAMA233,53955.4+24%

3094Ouray County, COCO5,26555.4+28%

3095Middlesex County, VAVA10,84155.5+19%

3096Adams County, WIWI21,75255.7+25%

3097Vilas County, WIWI23,76155.7+22%

3098Leelanau County, MIMI22,98255.9+31%

3099Sullivan County, PAPA5,85655.9+30%

3100Union County, GAGA27,85955.9+25%

3101Burnett County, WIWI17,22356.0+27%

3102Presque Isle County, MIMI13,12856.1+24%

3103Iron County, WIWI6,12756.1+25%

3104Brunswick County, NCNC174,70256.4+34%

3105Mineral County, COCO91056.4+25%

3106Highland County, VAVA2,31856.5+23%

3107Dolores County, COCO2,46656.7+34%

3108Montmorency County, MIMI9,84256.9+21%

3109Aitkin County, MNMN16,25256.9+22%

3110Carter County, MTMT1,38356.9+36%

3111Citrus County, FLFL171,66656.9+8%

3112San Juan County, WAWA18,57757.0+20%

3113Keweenaw County, MIMI2,18657.1+27%

3114Llano County, TXTX23,35357.4+8%

3115Sarasota County, FLFL479,95857.4+14%

3116Towns County, GAGA13,28557.4+18%

3117Blaine County, NENE45857.5+44%

3118Sierra County, NMNM11,39557.6+18%

3119Custer County, SDSD9,43157.6+33%

3120Roscommon County, MIMI23,91457.7+22%

3121Curry County, OROR22,62157.7+18%

3122Prairie County, MTMT1,11257.8+18%

3123Jeff Davis County, TXTX1,71158.0+36%

3124Hamilton County, NYNY5,00658.1+28%

3125Lancaster County, VAVA10,99558.2+17%

3126Custer County, COCO5,59058.2+30%

3127Meagher County, MTMT2,13758.3+36%

3128Quitman County, GAGA2,25458.4+39%

3129Wheeler County, OROR1,47259.3+23%

3130McCormick County, SCSC10,21559.5+45%

3131Menard County, TXTX1,95659.5+35%

3132Real County, TXTX2,74559.5+33%

3133Northumberland County, VAVA12,55759.5+19%

3134Ontonagon County, MIMI5,82359.8+30%

3135Jefferson County, WAWA33,97059.8+27%

3136Terrell County, TXTX70259.9+43%

3137Charlotte County, FLFL217,21259.9+10%

3138Custer County, IDID4,63660.0+46%

3139Alcona County, MIMI10,55660.0+22%

3140Kent County, TXTX67460.0+27%

3141La Paz County, AZAZ16,71160.2+29%

3142Catron County, NMNM3,82763.8+33%

3143Sumter County, FLFL157,77268.5+39%

3144Loving County, TXTX5286.2+88%

SHOWING 3,001–3,144 OF 3,144

1 2 3 4 5 6 7

Download CSV (full list, 3,144 rows)

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