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Most populous counties

County equivalents ranked by the Census Bureau’s latest July 1 population estimate. Land area and density are shown alongside, because a populous county is not necessarily a dense one.

Ranks 1801–1900

Vintage 2025 population estimates · 2026 Gazetteer land area · 3,222 county equivalents · page 19 of 33

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What this part of the ranking shows

This page runs from Wyandot County, Ohio at 21,567 residents to Westmoreland County, Virginia at 19,715 residents. The 100 entries represent 32 state-level jurisdictions. Georgia has the most entries on this page (10, tied for the lead).

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 populous counties, ranks 1801 through 1900. Population is the July 1, 2025 estimate; density is per square mile of land.
RankCounty / equivalentStatePopulationPer mi²Land mi²
1801Wyandot CountyOhio21,56753406.9
1802Long CountyGeorgia21,55754400.4
1803Loíza MunicipioPuerto Rico21,5421,11119.4
1804Fillmore CountyMinnesota21,54025861.3
1805Wabasha CountyMinnesota21,53741523
1806Meriwether CountyGeorgia21,51643500.9
1807Breckinridge CountyKentucky21,50338569.7
1808Adams CountyWashington21,488111,925
1809Mingo CountyWest Virginia21,45551423.1
1810Union CountyTennessee21,45096223.6
1811Colorado CountyTexas21,43922960.3
1812Stutsman CountyNorth Dakota21,4149.62,221.9
1813Conway CountyArkansas21,39339552
1814Tippah CountyMississippi21,38947457.8
1815Dodge CountyMinnesota21,37649439.4
1816Greene CountyGeorgia21,36755387.5
1817Orocovis MunicipioPuerto Rico21,32933563.6
1818Washington CountyNebraska21,30255389.9
1819Banks CountyGeorgia21,27392232.4
1820Jones CountyIowa21,25337575.6
1821Dukes CountyMassachusetts21,219206103.2
1822Taylor CountyFlorida21,210201,043.3
1823Scott CountyVirginia21,20040535.8
1824Lincoln CountyWyoming21,1805.24,075.3
1825Jersey CountyIllinois21,16057369.6
1826Brooke CountyWest Virginia21,14223789
1827Villalba MunicipioPuerto Rico21,13359335.6
1828Ogemaw CountyMichigan21,12137563.5
1829Seward CountyKansas21,07333639.7
1830Jackson CountyWisconsin20,99921987.9
1831Spencer CountyKentucky20,998112186.7
1832Smith CountyTennessee20,98167314.3
1833Newton CountyMississippi20,96036577.8
1834Lamar CountyGeorgia20,941114183.5
1835Clark CountyArkansas20,93824866
1836Pike CountyGeorgia20,93297216.1
1837Gray CountyTexas20,91923926
1838Buchanan CountyIowa20,88337571.1
1839Grenada CountyMississippi20,86849422.1
1840Jones CountyTexas20,86122928.6
1841Duchesne CountyUtah20,8566.43,235.5
1842Chaffee CountyColorado20,831211,013.4
1843Sullivan CountyIndiana20,83147447.2
1844Freestone CountyTexas20,81124877.7
1845Fayette CountyIllinois20,79029716.5
1846Simpson CountyKentucky20,78889234.2
1847Pierce CountyGeorgia20,76461340.5
1848Kewaunee CountyWisconsin20,75861342.5
1849Uinta CountyWyoming20,728102,081.7
1850Greene CountyNorth Carolina20,70078266.7
1851Carbon CountyUtah20,680141,479.3
1852Carroll CountyIndiana20,65555372.2
1853Logan CountyColorado20,654111,838.6
1854Barnwell CountySouth Carolina20,65338548.4
1855Lavaca CountyTexas20,65121969.7
1856Shelby CountyIllinois20,57627758.5
1857Union ParishLouisiana20,56123876.9
1858Burleson CountyTexas20,54931659.1
1859Benton CountyMissouri20,53629704
1860Polk CountyNorth Carolina20,53386237.7
1861Gilchrist CountyFlorida20,48859349.7
1862Mitchell CountyGeorgia20,46740512.2
1863Buena Vista CountyIowa20,44936574.9
1864Tyler CountyTexas20,44322924.3
1865Fairfield CountySouth Carolina20,34030686.3
1866Texas CountyOklahoma20,322102,041.3
1867Fentress CountyTennessee20,32241498.6
1868DeWitt CountyTexas20,30922909
1869Carroll CountyIowa20,30336569.5
1870Boone CountyWest Virginia20,25140502.4
1871Bourbon CountyKentucky20,24370289.8
1872Nodaway CountyMissouri20,17423877
1873Perry CountyIllinois20,16046441.9
1874Gonzales CountyTexas20,159191,066.7
1875Holmes CountyFlorida20,11942478.9
1876Jay CountyIndiana20,11852383.9
1877Taylor CountyWisconsin20,11821975.1
1878Hart CountyKentucky20,11749412.7
1879Marion CountyKentucky20,11559343.6
1880Fulton CountyIndiana20,09155368.4
1881Elbert CountyGeorgia20,07257351.1
1882Davison CountySouth Dakota20,06946435.6
1883Spencer CountyIndiana20,06151396.9
1884Worth CountyGeorgia20,05935570.7
1885Willacy CountyTexas19,97134590.6
1886Yell CountyArkansas19,95621930.4
1887Letcher CountyKentucky19,95259337.9
1888Vernon CountyMissouri19,94624826.4
1889Douglas CountyIllinois19,88048416.7
1890Coahoma CountyMississippi19,84936553.1
1891Lincoln CountyNew Mexico19,8444.14,831.1
1892Orange CountyIndiana19,83450398.4
1893Adair CountyOklahoma19,82835573.9
1894Woodward CountyOklahoma19,827161,242.8
1895Wayne CountyMississippi19,80724810.7
1896Wyoming CountyWest Virginia19,80140499.5
1897McIntosh CountyOklahoma19,75832618.3
1898Winneshiek CountyIowa19,73329689.8
1899Assumption ParishLouisiana19,72057344
1900Westmoreland CountyVirginia19,71586229.3

Read the differences behind ranks 1801–1900

The median population among these 100 entries is 20,690. The first and last entries span 1,852 residents. 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

  • Georgia10 entries · 10% of this page
  • Texas10 entries · 10% of this page
  • Kentucky7 entries · 7% of this page
  • Indiana6 entries · 6% of this page
  • Illinois5 entries · 5% of this page
  • Iowa5 entries · 5% of this page

The remaining 26 jurisdictions contribute 57 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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Browse by state for a complete state ranking.

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.