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2026 Census Gazetteer

Largest counties by total area

Rankings include both Census land and water measurements. Water can change the order substantially, especially for coastal counties and counties bordering the Great Lakes.

Ranks 501–600

3,222 county equivalents · page 6 of 33

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What this part of the ranking shows

This page runs from Ashtabula County, Ohio at 1,368.185 mi² of total area to Adams County, Colorado at 1,183.613 mi² of total area. The 100 entries represent 30 state-level jurisdictions. Texas has the most entries on this page (14).

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.

Largest counties by total area, ranks 501 through 600. Areas in square miles.
RankCounty / equivalentStateLand mi²Total mi²Water share
501Ashtabula CountyOhio702.41,368.248.7%
502Charleston CountySouth Carolina918.31,366.932.8%
503Monroe CountyNew York6571,366.751.9%
504Kinney CountyTexas1,360.51,365.10.3%
505Rapides ParishLouisiana1,324.11,361.52.7%
506Archuleta CountyColorado1,350.11,355.40.4%
507Tuscaloosa CountyAlabama1,320.91,351.22.2%
508Sawyer CountyWisconsin1,257.61,350.26.9%
509Stark CountyNorth Dakota1,334.91,340.30.4%
510Vernon ParishLouisiana1,326.71,340.31%
511Menominee CountyMichigan1,0441,338.222%
512Medina CountyTexas1,325.41,334.50.7%
513Dimmit CountyTexas1,328.91,334.50.4%
514Tillamook CountyOregon1,103.21,332.417.2%
515Carteret CountyNorth Carolina507.61,330.461.8%
516Hillsborough CountyFlorida1,022.21,329.223.1%
517Lake CountyCalifornia1,255.11,328.15.5%
518Glenn CountyCalifornia1,313.91,3271%
519Cattaraugus CountyNew York1,308.21,322.41.1%
520Oswego CountyNew York951.61,31227.5%
521Mellette CountySouth Dakota1,307.31,310.90.3%
522Schleicher CountyTexas1,310.61,310.70%
523Accomack CountyVirginia449.31,31065.7%
524Kootenai CountyIdaho1,237.81,3095.4%
525Broward CountyFlorida1,2031,308.48.1%
526Oceana CountyMichigan538.11,30658.8%
527Barnstable CountyMassachusetts394.21,305.569.8%
528Santa Clara CountyCalifornia1,291.11,304.11%
529Finney CountyKansas1,3021,302.70.1%
530Zavala CountyTexas1,297.41,301.70.3%
531Ramsey CountyNorth Dakota1,185.41,3018.9%
532Natchitoches ParishLouisiana1,2531,299.63.6%
533Walla Walla CountyWashington1,2701,2992.2%
534Divide CountyNorth Dakota1,261.11,294.62.6%
535Walsh CountyNorth Dakota1,281.61,2941%
536Morgan CountyColorado1,280.51,293.91%
537Maverick CountyTexas1,279.51,291.81%
538Lewis CountyNew York1,276.31,291.61.2%
539Conejos CountyColorado1,287.41,2910.3%
540Wells CountyNorth Dakota1,270.51,290.31.5%
541Caddo CountyOklahoma1,277.81,290.11%
542Woods CountyOklahoma1,286.51,2900.3%
543San Miguel CountyColorado1,286.71,288.70.2%
544Coleman CountyTexas1,2631,281.41.4%
545Manistee CountyMichigan542.31,280.757.7%
546Cameron CountyTexas891.71,279.730.3%
547Boundary CountyIdaho1,268.71,278.10.7%
548Price CountyWisconsin1,254.11,2781.9%
549Reno CountyKansas1,255.31,272.11.3%
550Sheboygan CountyWisconsin511.51,271.259.8%
551York CountyMaine991.21,269.721.9%
552Otero CountyColorado1,261.91,269.70.6%
553Kauai CountyHawaii619.81,266.351.1%
554Franklin CountyWashington1,241.61,2651.8%
555Beadle CountySouth Dakota1,258.71,264.80.5%
556Oneida CountyNew York1,212.41,257.83.6%
557Bexar CountyTexas1,240.51,256.11.2%
558Horry CountySouth Carolina1,133.11,254.79.7%
559Clarke CountyAlabama1,238.41,252.61.1%
560Kimble CountyTexas1,2511,251.20%
561Okaloosa CountyFlorida929.81,246.725.4%
562Woodward CountyOklahoma1,242.81,246.50.3%
563Cuyahoga CountyOhio457.21,245.563.3%
564Lycoming CountyPennsylvania1,228.91,243.91.2%
565Mason CountyMichigan4951,242.360.2%
566Upton CountyTexas1,241.31,241.50%
567Broadwater CountyMontana1,192.41,238.13.7%
568Dane CountyWisconsin1,196.51,237.53.3%
569Santa Cruz CountyArizona1,236.31,237.40.1%
570Houston CountyTexas1,2311,236.60.5%
571Oneida CountyWisconsin1,113.91,236.69.9%
572Berkeley CountySouth Carolina1,103.61,234.510.6%
573Ellis CountyOklahoma1,231.51,231.80%
574Costilla CountyColorado1,227.61,2310.3%
575Del Norte CountyCalifornia1,006.21,229.718.2%
576Starr CountyTexas1,223.21,229.10.5%
577Erie CountyNew York1,042.81,226.915%
578Pacific CountyWashington933.41,226.523.9%
579Brown CountyNebraska1,221.41,225.10.3%
580Mineral CountyMontana1,219.61,223.40.3%
581Gilliam CountyOregon1,204.71,222.81.5%
582Santa Rosa CountyFlorida1,012.41,222.217.2%
583Atascosa CountyTexas1,219.51,221.50.2%
584Slope CountyNorth Dakota1,215.31,219.50.3%
585Clark CountyWisconsin1,209.71,218.70.7%
586Cumberland CountyMaine836.21,217.531.3%
587Iron CountyMichigan1,166.11,211.23.7%
588Wasatch CountyUtah1,1771,207.52.5%
589Lincoln CountyIdaho1,201.41,205.80.4%
590Oneida CountyIdaho1,1991,200.50.1%
591Sussex CountyDelaware936.21,196.421.8%
592Cheyenne CountyNebraska1,1961,196.10%
593Lincoln CountyOregon9811,194.617.9%
594Marion CountyOregon1,180.81,191.10.9%
595Bennett CountySouth Dakota1,184.61,190.50.5%
596Milwaukee CountyWisconsin241.51,189.579.7%
597Hendry CountyFlorida1,1561,189.42.8%
598McLean CountyIllinois1,183.21,186.30.3%
599Sumner CountyKansas1,181.71,1850.3%
600Adams CountyColorado1,166.81,183.61.4%

Read the differences behind ranks 501–600

The median total area among these 100 entries is 1,270.477 mi². The first and last entries span 184.572 square miles. This median describes the entries on this page, not the full national dataset. Pagination is a browsing boundary, not a distinct geographic region.

A difference of one position means only that two entries are adjacent in this ordering. Their actual size difference can be tiny or substantial. Compare the measurements as well as the rank, and use the original square-meter fields when rounded labels appear equal.

Where the entries on this page are located

  • Texas14 entries · 14% of this page
  • Colorado7 entries · 7% of this page
  • Wisconsin7 entries · 7% of this page
  • New York6 entries · 6% of this page
  • North Dakota6 entries · 6% of this page
  • Florida5 entries · 5% of this page

The remaining 24 jurisdictions contribute 55 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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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.