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RANKING · 2020 CENSUS · 135 SHOWN OF 3,135

Youngest by median age, US counties · 2020

US counties with the youngest median age (2023 ACS).

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RELATEDOldest by median ageMost foreign-born residentsHighest uninsured rateMost womenMost menHighest disability rate
YEAR19902000201020202024
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RANKPLACESTATEPOPMEDIAN AGEVS 2000
3001Northampton County, NCNC16,49152.1+30%
3002Essex County, VTVT6,05152.1+34%
3003Northampton County, VAVA11,87952.1+23%
3004Smith County, KSKS3,56652.1+13%
3005Potter County, SDSD2,37752.2+14%
3006Costilla County, COCO3,67952.2+24%
3007Archuleta County, COCO14,30652.2+28%
3008Hardin County, ILIL3,58852.2+24%
3009Lincoln County, MEME36,59552.2+23%
3010Wells County, NDND3,72952.4+16%
3011Rappahannock County, VAVA7,43952.4+23%
3012Aransas County, TXTX26,14652.5+23%
3013Pope County, ILIL3,67252.5+28%
3014Schoolcraft County, MIMI8,18752.6+27%
3015Granite County, MTMT3,65852.6+23%
3016Blanco County, TXTX13,58152.6+28%
3017Marion County, TXTX9,89652.6+21%
3018Charles City County, VAVA6,62352.6+32%
3019Lemhi County, IDID8,47452.6+23%
3020Baxter County, ARAR42,98252.7+10%
3021Mason County, TXTX3,99052.7+13%
3022Sawyer County, WIWI18,84652.7+25%
3023Columbia County, WAWA4,14152.7+24%
3024Marion County, ARAR17,59352.8+20%
3025Mineral County, MTMT5,18552.8+28%
3026Prairie County, MTMT1,11252.8+8%
3027Wallowa County, OROR7,59552.8+19%
3028Kent County, TXTX67452.8+12%
3029Price County, WIWI13,98852.8+27%
3030Oneida County, WIWI38,13152.8+25%
3031Madison County, MTMT10,02652.9+22%
3032Lincoln County, OROR50,63652.9+20%
3033Collier County, FLFL417,13152.9+20%
3034Clallam County, WAWA78,20252.9+21%
3035Washburn County, WIWI17,08752.9+26%
3036Plumas County, CACA18,58353.0+20%
3037Lincoln County, NMNM19,84453.0+21%
3038Stonewall County, TXTX1,18653.0+21%
3039Grant County, NDND2,20653.1+14%
3040Cook County, MNMN5,52253.1+21%
3041Golden Valley County, MTMT84453.1+28%
3042Cherokee County, NCNC30,83053.1+21%
3043Meagher County, MTMT2,13753.2+24%
3044Sullivan County, PAPA5,85653.2+24%
3045Gillespie County, TXTX28,52753.2+15%
3046Menard County, TXTX1,95653.2+21%
3047Fannin County, GAGA26,11153.2+23%
3048Martin County, FLFL166,27253.3+13%
3049Iosco County, MIMI25,26653.4+21%
3050Petroleum County, MTMT54853.4+30%
3051Wahkiakum County, WAWA4,87353.4+20%
3052Pendleton County, WVWV5,82653.4+30%
3053Campbell County, SDSD1,37753.5+28%
3054Iron County, MIMI11,75753.6+18%
3055Nye County, NVNV57,33653.6+25%
3056Cumberland County, TNTN66,30053.6+26%
3057Esmeralda County, NVNV72953.6+19%
3058Mackinac County, MIMI11,23653.7+25%
3059Quitman County, GAGA2,25453.7+28%
3060Mohave County, AZAZ228,10253.8+25%
3061Oscoda County, MIMI8,72353.8+23%
3062Benton County, MOMO20,53653.8+16%
3063Mora County, NMNM4,05153.8+36%
3064Polk County, NCNC20,53353.8+20%
3065Nelson County, NDND2,96353.8+14%
3066Sabine County, TXTX10,01253.8+14%
3067Adams County, WIWI21,75253.8+21%
3068Bandera County, TXTX22,87653.8+30%
3069Pacific County, WAWA24,35753.8+17%
3070Sierra County, CACA3,09853.9+23%
3071Boise County, IDID8,54553.9+33%
3072Custer County, IDID4,63654.0+31%
3073Stone County, MOMO32,50354.0+22%
3074Lincoln County, MTMT22,32854.0+28%
3075Flagler County, FLFL140,36054.0+7%
3076Douglas County, NVNV50,11154.1+30%
3077Storey County, NVNV4,26054.2+22%
3078Bayfield County, WIWI16,78754.2+29%
3079Mathews County, VAVA8,52954.3+18%
3080Burnett County, WIWI17,22354.4+23%
3081Door County, WIWI30,61654.5+27%
3082La Paz County, AZAZ16,71154.6+17%
3083Pamlico County, NCNC12,75854.6+27%
3084Ouray County, COCO5,26554.6+26%
3085McIntosh County, NDND2,45154.7+7%
3086Highlands County, FLFL111,12254.7+9%
3087Carroll County, NHNH52,78454.9+29%
3088Adams County, IDID5,01354.9+24%
3089Barnstable County, MAMA233,53955.0+23%
3090Leelanau County, MIMI22,98255.1+29%
3091Boyd County, NENE1,67455.1+26%
3092Fall River County, SDSD7,46755.1+21%
3093Indian River County, FLFL172,79955.1+17%
3094Sanders County, MTMT14,06255.2+25%
3095Clay County, NCNC12,23955.3+18%
3096Middlesex County, VAVA10,84155.4+18%
3097Yavapai County, AZAZ252,55255.5+25%
3098Florence County, WIWI4,74855.5+32%
3099Wheeler County, OROR1,47255.9+16%
3100Union County, GAGA27,85955.9+25%
3101Huerfano County, COCO7,01156.0+34%
3102Presque Isle County, MIMI13,12856.1+24%
3103San Juan County, WAWA18,57756.1+18%
3104Aitkin County, MNMN16,25256.2+21%
3105Real County, TXTX2,74556.3+26%
3106Hinsdale County, COCO75356.3+28%
3107Custer County, SDSD9,43156.4+31%
3108Iron County, WIWI6,12756.4+25%
3109Brunswick County, NCNC174,70256.5+34%
3110Keweenaw County, MIMI2,18656.6+26%
3111Montmorency County, MIMI9,84256.6+20%
3112Roscommon County, MIMI23,91456.6+20%
3113Mineral County, COCO91056.8+26%
3114Vilas County, WIWI23,76156.8+24%
3115Hamilton County, NYNY5,00657.0+26%
3116Hickory County, MOMO9,04457.2+15%
3117Towns County, GAGA13,28557.2+18%
3118Sierra County, NMNM11,39557.3+17%
3119Curry County, OROR22,62157.5+18%
3120Sarasota County, FLFL479,95857.6+14%
3121Llano County, TXTX23,35357.7+9%
3122Citrus County, FLFL171,66657.9+10%
3123Alcona County, MIMI10,55658.2+19%
3124Custer County, COCO5,59058.3+30%
3125Harding County, NMNM61758.4+20%
3126Jeff Davis County, TXTX1,71158.4+37%
3127Highland County, VAVA2,31858.4+27%
3128McCormick County, SCSC10,21558.5+42%
3129Northumberland County, VAVA12,55758.7+17%
3130Ontonagon County, MIMI5,82359.1+29%
3131Lancaster County, VAVA10,99559.2+19%
3132Jefferson County, WAWA33,97059.6+27%
3133Charlotte County, FLFL217,21260.2+11%
3134Catron County, NMNM3,82761.9+29%
3135Sumter County, FLFL157,77268.5+39%
SHOWING 3,001–3,135 OF 3,135
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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES