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RANKING · 2020 CENSUS · 131 SHOWN OF 3,131

Most population gained, US counties · 2020

US counties that added the most residents from the 2010 census to 2020, by raw count of people rather than percentage.

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RANKPLACESTATEPOPPOPULATION CHANGEVS 2000
3001Armstrong County, PAPA63,698-3,383+212%
3002Grant County, ININ66,524-3,387+342%
3003Marshall County, MSMS34,654-3,392−173%
3004Williamsburg County, SCSC29,662-3,397−945%
3005Lee County, VAVA21,642-3,414+276%
3006Ripley County, MOMO10,717-3,421−384%
3007Madison County, ILIL263,110-3,423−135%
3008St. Lawrence County, NYNY105,488-3,439+7898%
3009St. John the Baptist Parish, LALA39,875-3,447−213%
3010Fulton County, ILIL32,901-3,460−2135%
3011Chesterfield County, SCSC44,740-3,461−183%
3012Ouachita County, ARAR21,731-3,470+95%
3013Sunflower County, MSMS22,893-3,479−332%
3014Wayne County, WVWV37,309-3,499−376%
3015Floyd County, KYKY34,401-3,509+206%
3016Livingston County, NYNY61,438-3,559−282%
3017Vernon Parish, LALA45,091-3,584−62%
3018Somerset County, PAPA72,004-3,613−300%
3019Dunklin County, MOMO26,855-3,670−8635%
3020Delaware County, NYNY44,305-3,672−542%
3021Richmond County, NCNC42,041-3,693−280%
3022Dooly County, GAGA11,156-3,710−328%
3023Otsego County, NYNY60,589-3,735−422%
3024Buchanan County, VAVA18,492-3,743−14%
3025Hale County, TXTX31,819-3,751−294%
3026Dillon County, SCSC27,458-3,770−334%
3027Cayuga County, NYNY74,365-3,778+979%
3028Niagara County, NYNY208,912-3,803+318%
3029Clarendon County, SCSC31,043-3,827−194%
3030Marion County, SCSC28,242-3,879−348%
3031Belmont County, OHOH64,434-3,903+360%
3032Bay County, MIMI102,123-3,915+150%
3033Ashtabula County, OHOH96,713-3,923−235%
3034La Paz County, AZAZ16,711-3,932−167%
3035Leflore County, MSMS25,686-3,978−756%
3036Montgomery County, KSKS30,177-3,985+55%
3037Telfair County, GAGA11,195-4,023−607%
3038Franklin County, NYNY46,500-4,044−188%
3039Warren County, MSMS41,759-4,051−330%
3040Tazewell County, ILIL130,049-4,051−185%
3041Allen County, OHOH100,881-4,125+222%
3042Logan County, WVWV30,375-4,176−22%
3043Acadia Parish, LALA57,032-4,197−241%
3044Lawrence County, OHOH55,710-4,210−968%
3045Webster Parish, LALA34,948-4,240+2584%
3046LaSalle County, ILIL107,773-4,266−193%
3047Blair County, PAPA119,541-4,267+205%
3048Raleigh County, WVWV71,775-4,268−278%
3049Lenoir County, NCNC55,837-4,373−284%
3050Herkimer County, NYNY59,219-4,380+220%
3051Sampson County, NCNC61,504-4,395−134%
3052Buchanan County, MOMO83,540-4,408−251%
3053Jefferson County, OHOH63,597-4,460−30%
3054Venango County, PAPA49,346-4,530+149%
3055Oswego County, NYNY118,569-4,584−856%
3056Bell County, KYKY22,829-4,594+218%
3057Northampton County, NCNC16,491-4,628−459%
3058Tazewell County, VAVA38,635-4,649+241%
3059Muskogee County, OKOK66,708-4,651−439%
3060Peoria County, ILIL178,553-4,664−870%
3061Chemung County, NYNY80,415-4,682+14%
3062DeKalb County, ILIL101,835-4,740−143%
3063Coahoma County, MSMS19,849-4,761+356%
3064Aroostook County, MEME66,609-4,765−63%
3065Norfolk, VAVA231,013-4,798−82%
3066Crawford County, PAPA81,792-4,827−215%
3067Anson County, NCNC21,758-4,893−372%
3068Susquehanna County, PAPA38,237-4,922−365%
3069Lawrence County, PAPA83,911-5,038+214%
3070Sussex County, NJNJ148,063-5,044−138%
3071St. Francis County, ARAR21,800-5,168−721%
3072Phillips County, ARAR14,255-5,189+117%
3073Schuylkill County, PAPA145,085-5,240+133%
3074St. Mary Parish, LALA46,552-5,244+14%
3075Wayne County, NCNC122,278-5,290−161%
3076Wise County, VAVA34,824-5,322−1068%
3077Dallas County, ALAL35,140-5,358+204%
3078McDonough County, ILIL25,916-5,374+131%
3079Steuben County, NYNY91,855-5,406+1393%
3080Madison County, NYNY67,120-5,426−1790%
3081Scioto County, OHOH71,365-5,491+385%
3082Apache County, AZAZ64,445-5,497−170%
3083Fayette County, WVWV38,165-5,551+1388%
3084Bladen County, NCNC30,007-5,584−254%
3085Indiana County, PAPA82,878-5,634+1348%
3086Delaware County, ININ113,106-5,768+548%
3087Darlington County, SCSC62,888-5,776−204%
3088Mississippi County, ARAR37,828-5,795+4%
3089Cochise County, AZAZ126,332-5,899−129%
3090Isabella County, MIMI64,691-5,917−168%
3091Kankakee County, ILIL105,525-5,947−178%
3092Columbiana County, OHOH99,377-5,964−257%
3093Mercer County, PAPA107,860-5,986+743%
3094Halifax County, NCNC46,534-6,069−427%
3095Washington County, MSMS40,446-6,215+25%
3096Pike County, KYKY54,721-6,355+65%
3097Macon County, ILIL99,300-6,770+171%
3098Allegany County, MDMD66,848-6,981+43531%
3099Coles County, ILIL46,607-7,010−552%
3100Jackson County, ILIL52,501-7,244+398%
3101Chautauqua County, NYNY124,126-7,248+238%
3102Lauderdale County, MSMS70,317-7,277−379%
3103Vermilion County, ILIL71,259-7,437+71%
3104Columbus County, NCNC50,487-7,475−245%
3105Edgecombe County, NCNC49,121-7,652+704%
3106Fayette County, PAPA123,021-7,802−337%
3107Milwaukee County, WIWI924,216-8,246−57%
3108Orangeburg County, SCSC83,177-8,278−222%
3109Trumbull County, OHOH198,972-8,335+209%
3110Butte County, CACA209,211-8,368−140%
3111San Juan County, NMNM120,340-8,383−138%
3112Dougherty County, GAGA82,616-8,775+3467%
3113Erie County, PAPA265,832-9,690−284%
3114Duplin County, NCNC51,571-9,790−208%
3115Winnebago County, ILIL283,674-9,916−139%
3116Saginaw County, MIMI187,688-10,045+427%
3117Jefferson County, ARAR62,987-10,175+742%
3118Cambria County, PAPA128,968-10,207−2%
3119Mahoning County, OHOH224,706-10,209+41%
3120Westmoreland County, PAPA349,324-10,506+3103%
3121Lucas County, OHOH423,347-10,536+44%
3122Kanawha County, WVWV172,381-12,318+63%
3123St. Clair County, ILIL250,708-12,656+87%
3124Cuyahoga County, OHOH1,232,925-15,305−16%
3125Caddo Parish, LALA224,226-17,121−538%
3126Hinds County, MSMS211,888-17,543+382%
3127Robeson County, NCNC119,941-17,638−197%
3128St. Louis, MOMO278,144-17,716−63%
3129Genesee County, MIMI401,093-19,579−445%
3130Wayne County, MIMI1,769,038-27,023−47%
3131Baltimore, MDMD569,997-35,253−58%
SHOWING 3,001–3,131 OF 3,131

UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS