Which county has the highest population change?

Maricopa County, Arizona ranks #1 with +950,048 (2000 Decennial Census).

What are the top 5 counties by population change?

Maricopa County, Arizona, Los Angeles County, California, Clark County, Nevada, Harris County, Texas, Orange County, California.

How many counties are in this ranking?

3,122 counties qualify after filtering for population minimums and data availability. The ranking covers 2000 Decennial Census data.

How is population change measured?

Change in the number of residents from the prior decennial census (raw count, not a percentage). Source: US Census Bureau, 2000 Decennial Census.

RANKING · 2000 CENSUS · 122 SHOWN OF 3,122

Most population gained, US counties · 2000

US counties that added the most residents from the 1990 census to 2000, by raw count of people rather than percentage.

Flip the list · Most population lost, US counties →

All statesAll rankings

SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS –

3001Dickenson County, VAVA13,236-1,225–

3002Beadle County, SDSD19,624-1,230–

3003Cavalier County, NDND3,497-1,233–

3004Leslie County, KYKY9,627-1,241–

3005Bolivar County, MSMS28,262-1,242–

3006Hancock County, ILIL16,803-1,252–

3007Allen County, OHOH100,881-1,282–

3008Franklin County, ILIL36,916-1,301–

3009Andrews County, TXTX18,914-1,334–

3010Tazewell County, VAVA38,635-1,362–

3011Washington County, MEME31,334-1,367–

3012Williams County, NDND41,767-1,368–

3013Herkimer County, NYNY59,219-1,370–

3014Sumter County, ALAL11,588-1,376–

3015Boyd County, KYKY47,751-1,398–

3016Blair County, PAPA119,541-1,398–

3017Mineral County, NVNV4,407-1,404–

3018Piscataquis County, MEME17,409-1,418–

3019Kossuth County, IAIA14,322-1,428–

3020Bell County, KYKY22,829-1,446–

3021Walsh County, NDND10,179-1,451–

3022Winkler County, TXTX7,540-1,453–

3023Jackson County, ILIL52,501-1,455–

3024Desha County, ARAR9,984-1,457–

3025Yoakum County, TXTX7,438-1,464–

3026Androscoggin County, MEME116,487-1,466–

3027Hockley County, TXTX21,600-1,483–

3028Roanoke, VAVA99,111-1,486–

3029Brooke County, WVWV21,142-1,545–

3030Wetzel County, WVWV13,734-1,565–

3031Bay County, MIMI102,123-1,566–

3032Chicot County, ARAR9,107-1,596–

3033Lawrence County, PAPA83,911-1,603–

3034Penobscot County, MEME157,967-1,682–

3035Washington County, PAPA210,802-1,687–

3036Coos County, NHNH31,343-1,717–

3037Letcher County, KYKY19,952-1,723–

3038Newport County, RIRI83,051-1,761–

3039Dallas County, ALAL35,140-1,765–

3040Ouachita County, ARAR21,731-1,784–

3041Venango County, PAPA49,346-1,816–

3042Hutchinson County, TXTX19,633-1,832–

3043Marshall County, WVWV29,159-1,837–

3044Pemiscot County, MOMO14,465-1,874–

3045Rensselaer County, NYNY160,510-1,891–

3046Saginaw County, MIMI187,688-1,907–

3047Yukon-Koyukuk Census Area, AKAK5,028-1,927–

3048Koochiching County, MNMN11,587-1,944–

3049Mercer County, WVWV57,503-2,000–

3050Chattahoochee County, GAGA8,465-2,052–

3051Chautauqua County, NYNY124,126-2,145–

3052Ward County, TXTX11,125-2,206–

3053Northumberland County, PAPA89,920-2,215–

3054Schuylkill County, PAPA145,085-2,249–

3055Scurry County, TXTX16,162-2,273–

3056Montgomery County, NYNY50,046-2,273–

3057McDonough County, ILIL25,916-2,331–

3058Phillips County, ARAR14,255-2,393–

3059Macon County, ILIL99,300-2,500–

3060Geary County, KSKS36,338-2,506–

3061Montgomery County, KSKS30,177-2,564–

3062Hancock County, WVWV27,729-2,566–

3063Ingham County, MIMI289,709-2,592–

3064Trumbull County, OHOH198,972-2,697–

3065Reeves County, TXTX12,138-2,715–

3066Schenectady County, NYNY162,581-2,730–

3067Clark County, OHOH135,340-2,806–

3068Iosco County, MIMI25,266-2,870–

3069Wyoming County, WVWV19,801-3,282–

3070Portsmouth, VAVA96,777-3,342–

3071Harlan County, KYKY24,725-3,372–

3072Ohio County, WVWV40,496-3,444–

3073Hinds County, MSMS211,888-3,641–

3074Calhoun County, ALAL115,834-3,785–

3075Pike County, KYKY54,721-3,847–

3076Aleutians West Census Area, AKAK5,240-4,013–

3077Wyandotte County, KSKS170,597-4,111–

3078Chemung County, NYNY80,415-4,125–

3079Riley County, KSKS72,598-4,296–

3080Vermilion County, ILIL71,259-4,338–

3081Buchanan County, VAVA18,492-4,355–

3082Berkshire County, MAMA128,224-4,399–

3083Grand Forks County, NDND74,501-4,574–

3084St. Mary Parish, LALA46,552-4,586–

3085Danville, VAVA41,647-4,645–

3086Petersburg, VAVA33,734-4,646–

3087Beaver County, PAPA166,032-4,681–

3088Washington County, MSMS40,446-4,958–

3089Rapides Parish, LALA125,877-5,219–

3090Richmond, VAVA237,257-5,266–

3091Logan County, WVWV30,375-5,322–

3092Mingo County, WVWV21,455-5,486–

3093Mississippi County, ARAR37,828-5,546–

3094Lackawanna County, PAPA216,502-5,744–

3095Clinton County, NYNY78,138-6,075–

3096Marquette County, MIMI68,064-6,253–

3097Jefferson County, OHOH63,597-6,404–

3098St. Clair County, ILIL250,708-6,770–

3099Mahoning County, OHOH224,706-7,251–

3100Lucas County, OHOH423,347-7,307–

3101Kanawha County, WVWV172,381-7,546–

3102McDowell County, WVWV16,878-7,904–

3103Luzerne County, PAPA332,126-8,899–

3104Vernon Parish, LALA45,091-9,430–

3105Cambria County, PAPA128,968-10,431–

3106Onondaga County, NYNY466,584-10,637–

3107Broome County, NYNY195,736-11,624–

3108Orleans Parish, LALA362,154-12,264–

3109Aroostook County, MEME66,609-12,998–

3110Montgomery County, OHOH539,598-14,747–

3111Oneida County, NYNY226,392-15,367–

3112Cuyahoga County, OHOH1,232,925-18,162–

3113Erie County, NYNY946,741-18,267–

3114Milwaukee County, WIWI924,216-19,111–

3115Hamilton County, OHOH838,418-20,925–

3116Norfolk, VAVA231,013-26,826–

3117District of Columbia, DCDC693,645-34,841–

3118St. Louis, MOMO278,144-48,496–

3119Wayne County, MIMI1,769,038-50,525–

3120Allegheny County, PAPA1,225,035-54,783–

3121Philadelphia County, PAPA1,574,281-68,027–

3122Baltimore, MDMD569,997-84,860–

SHOWING 3,001–3,122 OF 3,122

1 2 3 4 5 6 7

Download CSV (full list, 3,122 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS