Which county has the highest population density?

New York County, New York ranks #1 with 74,775 (2020 Decennial Census).

What are the top 5 counties by population density?

New York County, New York, Kings County, New York, Bronx County, New York, Queens County, New York, San Francisco County, California.

How many counties are in this ranking?

3,135 counties qualify after filtering for population minimums and data availability. The ranking covers 2020 Decennial Census data.

How is population density measured?

Residents per square mile of land area. Source: US Census Bureau, 2020 Decennial Census.

RANKING · 2020 CENSUS · 135 SHOWN OF 3,135

Most densely populated, US counties · 2020

US counties ranked by residents per square mile (2020).

Flip the list · Most sparsely populated, US counties →

All statesAll rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

3001Lemhi County, IDID8,4742+2%

3002Divide County, NDND2,1102−4%

3003Golden Valley County, NDND1,8082−10%

3004Beaverhead County, MTMT10,0432+2%

3005Blaine County, MTMT6,86020%

3006Rosebud County, MTMT8,2532−11%

3007Gilliam County, OROR1,9712+4%

3008Wallace County, KSKS1,4412−14%

3009Greeley County, KSKS1,1822−16%

3010Alpine County, CACA1,04320%

3011Grant County, OROR7,0752−9%

3012Briscoe County, TXTX1,4742−20%

3013Presidio County, TXTX5,4332−16%

3014Corson County, SDSD3,7812−7%

3015Throckmorton County, TXTX1,5542−22%

3016Foard County, TXTX1,0442−32%

3017Owyhee County, IDID12,6612+12%

3018Brewster County, TXTX9,4582+8%

3019Valley County, MTMT7,3852−1%

3020Cottle County, TXTX1,2242−28%

3021Jackson County, SDSD2,6662−4%

3022Sterling County, TXTX1,3491−2%

3023Chouteau County, MTMT5,8651−1%

3024Guadalupe County, NMNM4,3431−5%

3025Mellette County, SDSD2,1371−8%

3026Hyde County, SDSD1,1911−24%

3027Wheatland County, MTMT2,1001−8%

3028Irion County, TXTX1,4631−15%

3029Sully County, SDSD1,4791−7%

3030Grant County, NDND2,2061−19%

3031Baca County, COCO3,3471−22%

3032Liberty County, MTMT1,9571−9%

3033Stonewall County, TXTX1,1861−26%

3034Wheeler County, NENE7891−13%

3035Daggett County, UTUT9341+2%

3036Sheridan County, NDND1,2961−26%

3037Logan County, NENE6691−7%

3038Rock County, NENE1,2591−28%

3039Cimarron County, OKOK2,0591−27%

3040Glasscock County, TXTX1,1281−21%

3041Ziebach County, SDSD2,3891−4%

3042Hidalgo County, NMNM3,9291−30%

3043Mineral County, NVNV4,4071−10%

3044Hayes County, NENE8211−20%

3045Aleutians West Census Area, AKAK5,2401−4%

3046Oldham County, TXTX1,7831−20%

3047Petersburg, AKAK3,3941–

3048Daniels County, MTMT1,6121−18%

3049Butte County, IDID2,7831−11%

3050Crockett County, TXTX2,7691−24%

3051Pershing County, NVNV6,4211−1%

3052Garden County, NENE1,8041−18%

3053Prince of Wales-Hyder Census Area, AKAK5,7771–

3054Judith Basin County, MTMT2,1621−13%

3055Loup County, NENE5701−15%

3056Motley County, TXTX1,0431−25%

3057Union County, NMNM3,8441−2%

3058Wibaux County, MTMT8851−12%

3059Lander County, NVNV5,8721−1%

3060Haakon County, SDSD1,8021−15%

3061White Pine County, NVNV8,6611−1%

3062Wayne County, UTUT2,5871−1%

3063Lake County, OROR8,1871+10%

3064Camas County, IDID1,3161+9%

3065Keya Paha County, NENE7921−22%

3066Mineral County, COCO9101+4%

3067Perkins County, SDSD2,8531−16%

3068Hooker County, NENE6861−9%

3069Cheyenne County, COCO1,7131−22%

3070Garfield County, UTUT5,2561+7%

3071Jones County, SDSD9131−23%

3072Niobrara County, WYWY2,3411+2%

3073Thomas County, NENE6391−8%

3074Cherry County, NENE5,5611−11%

3075Banner County, NENE6861−18%

3076Roberts County, TXTX8671−7%

3077Haines, AKAK2,0681−13%

3078Jeff Davis County, TXTX1,7111−10%

3079Custer County, IDID4,6361−2%

3080Jackson County, COCO1,2111−13%

3081Wheeler County, OROR1,4721−6%

3082Kent County, TXTX6741−12%

3083Wrangell, AKAK2,0071–

3084Billings County, NDND1,0711+6%

3085Phillips County, MTMT4,2031−8%

3086Kiowa County, COCO1,4121−11%

3087Meagher County, MTMT2,13710%

3088Grant County, NENE5611−18%

3089Treasure County, MTMT7281−11%

3090Chugach Census Area, AKAK6,5531–

3091Harney County, OROR7,3801−1%

3092De Baca County, NMNM1,6471−24%

3093Hinsdale County, COCO75310%

3094Borden County, TXTX5671−13%

3095Golden Valley County, MTMT8441−21%

3096Hudspeth County, TXTX3,4331−4%

3097Edwards County, TXTX1,3701−34%

3098McCone County, MTMT1,7201−13%

3099Prairie County, MTMT1,1121−9%

3100Arthur County, NENE3961−2%

3101Blaine County, NENE4581−26%

3102Slope County, NDND6281−8%

3103Culberson County, TXTX2,2671−26%

3104Sioux County, NENE1,1881−23%

3105McMullen County, TXTX5441−29%

3106Catron County, NMNM3,8271+1%

3107Powder River County, MTMT1,7811−9%

3108Harding County, SDSD1,3310−3%

3109Kusilvak Census Area, AKAK7,9320–

3110Aleutians East, AKAK3,4790+27%

3111McPherson County, NENE3690−25%

3112Bethel Census Area, AKAK18,3910+17%

3113Clark County, IDID7830−23%

3114Eureka County, NVNV1,8670+12%

3115Nome Census Area, AKAK9,8300+9%

3116Carter County, MTMT1,3830+4%

3117Lincoln County, NVNV4,3200+8%

3118Hoonah-Angoon Census Area, AKAK2,2710–

3119Terrell County, TXTX7020−30%

3120Harding County, NMNM6170−19%

3121Petroleum County, MTMT5480+1%

3122King County, TXTX1920−26%

3123Southeast Fairbanks Census Area, AKAK7,2700+10%

3124Dillingham Census Area, AKAK4,4830−1%

3125Garfield County, MTMT1,1480−8%

3126Kenedy County, TXTX3190−15%

3127Northwest Arctic, AKAK7,0950+8%

3128Esmeralda County, NVNV7290−25%

3129Denali, AKAK1,6160−14%

3130North Slope, AKAK10,5820+49%

3131Copper River Census Area, AKAK2,6660–

3132Loving County, TXTX520−4%

3133Yakutat, AKAK6720−18%

3134Lake and Peninsula, AKAK1,3570−19%

3135Yukon-Koyukuk Census Area, AKAK5,0280−18%

SHOWING 3,001–3,135 OF 3,135

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Download CSV (full list, 3,135 rows)

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