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Most densely populated counties

Population per square mile of land, using the latest Census Bureau estimate and Gazetteer land area. Small urban counties and independent cities lead because a large population shares little land.

Ranks 3001–3100

Vintage 2025 population estimates · 2026 Gazetteer land area · 3,222 county equivalents · page 31 of 33

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What this part of the ranking shows

This page runs from Moffat County, Colorado at 2.8 people per mi² to Grant County, Oregon at 1.6 people per mi². The 100 entries represent 16 state-level jurisdictions. North Dakota has the most entries on this page (17).

Rank numbers continue across pages and describe the full selected ranking. They are not state ranks. Start at rank 1 for the leading entries, or open a county profile for its state rank and median comparisons.

Most densely populated counties, ranks 3001 through 3100. Population is the July 1, 2025 estimate; density is per square mile of land.
RankCounty / equivalentStatePopulationPer mi²Land mi²
3001Moffat CountyColorado13,1222.84,743.3
3002Potter CountySouth Dakota2,3772.8861.1
3003Crook CountyWyoming7,8522.82,854.5
3004McHenry CountyNorth Dakota5,1302.71,873.9
3005Sierra CountyNew Mexico11,3952.74,181.2
3006Fergus CountyMontana11,8252.74,339.3
3007Frontier CountyNebraska2,6552.7974.7
3008Toole CountyMontana5,2112.71,914.9
3009Sheridan CountyKansas2,4272.7896
3010Collingsworth CountyTexas2,4872.7918.4
3011Reagan CountyTexas3,1662.71,175.3
3012Beaver CountyOklahoma4,8822.71,814.8
3013Grand CountyUtah9,7902.73,672.9
3014Renville CountyNorth Dakota2,3312.7877.2
3015Graham CountyKansas2,3712.6898.5
3016Oliver CountyNorth Dakota1,8982.6722.4
3017Rich CountyUtah2,6872.61,028.8
3018Cheyenne CountyKansas2,6042.61,019.9
3019Big Horn CountyMontana12,7522.64,997.8
3020Steele CountyNorth Dakota1,7972.5712.1
3021Upton CountyTexas3,1312.51,241.3
3022McIntosh CountyNorth Dakota2,4512.5974.6
3023Hamilton CountyKansas2,5002.5996.5
3024Skagway MunicipalityAlaska1,1042.5442.9
3025Sherman CountyOregon2,0512.5823.6
3026Logan CountyKansas2,6612.51,073
3027Gove CountyKansas2,6312.51,071.7
3028Ness CountyKansas2,6172.41,074.7
3029Wallowa CountyOregon7,5952.43,145.9
3030Socorro CountyNew Mexico15,8382.46,646.4
3031Bowman CountyNorth Dakota2,7622.41,161.8
3032Dewey CountySouth Dakota5,4192.42,302.4
3033Cavalier CountyNorth Dakota3,4972.31,489.1
3034Brown CountyNebraska2,8262.31,221.4
3035Dolores CountyColorado2,4662.31,067.2
3036Adams CountyNorth Dakota2,2752.3987.5
3037Kinney CountyTexas3,1282.31,360.5
3038Hot Springs CountyWyoming4,6002.32,004.4
3039Emery CountyUtah10,1772.34,462.6
3040Rawlins CountyKansas2,4312.31,069.4
3041Lyman CountySouth Dakota3,6942.21,642.3
3042Faulk CountySouth Dakota2,1782.2981.7
3043Sutton CountyTexas3,2032.21,453.9
3044Hettinger CountyNorth Dakota2,4922.21,132.2
3045Lincoln CountyColorado5,6452.22,577.7
3046Hand CountySouth Dakota3,1212.21,436.6
3047Menard CountyTexas1,9562.2902
3048Kane CountyUtah8,5972.23,994.1
3049Johnson CountyWyoming8,9082.14,154.2
3050Modoc CountyCalifornia8,4262.13,948.2
3051Emmons CountyNorth Dakota3,2152.11,508.4
3052Saguache CountyColorado6,7322.13,168.6
3053Comanche CountyKansas1,6732.1788.3
3054Granite CountyMontana3,6582.11,727.2
3055Idaho CountyIdaho17,8742.18,477.5
3056Mora CountyNew Mexico4,0512.11,926.3
3057Lane CountyKansas1,5082.1717.4
3058San Juan CountyColorado8132.1387.5
3059Stanley CountySouth Dakota3,0182.11,444.4
3060Rio Blanco CountyColorado6,6832.13,221
3061Millard CountyUtah14,0572.16,785.5
3062McPherson CountySouth Dakota2,3472.11,136.7
3063Sheridan CountyMontana3,43621,676.9
3064Sweet Grass CountyMontana3,76221,855.5
3065Armstrong CountyTexas1,8432909.1
3066Dunn CountyNorth Dakota4,05822,008.6
3067Piute CountyUtah1,5092758.2
3068Towner CountyNorth Dakota2,04021,025.1
3069Sheridan CountyNebraska4,80922,440.2
3070Clark CountyKansas1,9001.9974.6
3071Burke CountyNorth Dakota2,1321.91,103.6
3072Hodgeman CountyKansas1,6191.9860
3073Washington CountyColorado4,7321.92,518.1
3074Campbell CountySouth Dakota1,3771.9733.8
3075Dickens CountyTexas1,6921.9901.7
3076Logan CountyNorth Dakota1,8591.9992.6
3077San Juan CountyUtah14,5421.97,823.7
3078Lemhi CountyIdaho8,4741.94,563.7
3079Kodiak Island BoroughAlaska12,3871.96,689.9
3080Sublette CountyWyoming8,9291.84,886.5
3081Fallon CountyMontana2,9591.81,620.6
3082Beaverhead CountyMontana10,0431.85,542.7
3083Golden Valley CountyNorth Dakota1,8081.81,000.9
3084Humboldt CountyNevada17,2671.89,640.8
3085Inyo CountyCalifornia18,1581.810,197.3
3086Carbon CountyWyoming14,0131.87,897.7
3087Kidder CountyNorth Dakota2,3931.81,351.1
3088Bristol Bay BoroughAlaska8471.8481.4
3089Schleicher CountyTexas2,2451.71,310.6
3090Dundy CountyNebraska1,5681.7919.7
3091Throckmorton CountyTexas1,5541.7912.6
3092Divide CountyNorth Dakota2,1101.71,261.1
3093Owyhee CountyIdaho12,6611.77,668.2
3094Rosebud CountyMontana8,2531.65,008.1
3095Briscoe CountyTexas1,4741.6900
3096Gilliam CountyOregon1,9711.61,204.7
3097Mellette CountySouth Dakota2,1371.61,307.3
3098Blaine CountyMontana6,8601.64,227.5
3099Wallace CountyKansas1,4411.6913.7
3100Grant CountyOregon7,0751.64,527.8

Read the differences behind ranks 3001–3100

The median density among these 100 entries is 2.1 people per mi². The first and last entries span 1.2 people per square mile. This median describes the entries on this page, not the full national dataset. Pagination is a browsing boundary, not a distinct geographic region.

Adjacent ranks can differ by a handful of residents or by many thousands. Open a county profile for its population trend since 2020, land area, and state comparisons.

Where the entries on this page are located

  • North Dakota17 entries · 17% of this page
  • Kansas13 entries · 13% of this page
  • Texas11 entries · 11% of this page
  • Montana10 entries · 10% of this page
  • South Dakota9 entries · 9% of this page
  • Colorado7 entries · 7% of this page

The remaining 10 jurisdictions contribute 33 entries. The list above shows the six most represented, with alphabetical ordering when counts tie.

These counts describe representation in this slice of the ranking. They do not measure a state’s share of national land or population. Compare the first and last county equivalents on this page to inspect land, water, and total area separately.

Read the geographic explanation behind this ranking, or return to the ranking overview for the national distribution and guidance on selecting a measurement.

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Population rankings use Census Bureau Vintage 2025 estimates; density rankings divide them by original ALAND square meters. Land rankings use original ALAND square meters; total-area rankings use ALAND + AWATER. Exact ties use ascending GEOID. Displayed square-mile values are rounded. Read the methodology.