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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 401–500

3,222 county equivalents · page 5 of 33

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What this part of the ranking shows

This page runs from Butte County, California at 1,677.131 mi² of total area to Lake County, Illinois at 1,368.331 mi² of total area. The 100 entries represent 25 state-level jurisdictions. Texas has the most entries on this page (13).

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 401 through 500. Areas in square miles.
RankCounty / equivalentStateLand mi²Total mi²Water share
401Butte CountyCalifornia1,636.51,677.12.4%
402Petroleum CountyMontana1,655.61,674.51.1%
403Burleigh CountyNorth Dakota1,632.71,668.52.1%
404Grant CountyNorth Dakota1,659.21,6660.4%
405Marion CountyFlorida1,588.41,662.74.5%
406Jefferson CountyMontana1,6571,659.40.1%
407Lake CountyMontana1,490.51,6549.9%
408Prowers CountyColorado1,638.41,644.30.4%
409Mobile CountyAlabama1,229.41,644.125.2%
410Pondera CountyMontana1,624.61,641.51%
411Josephine CountyOregon1,638.61,640.80.1%
412Cook CountyIllinois944.91,634.642.2%
413Ottawa CountyMichigan563.51,631.465.5%
414Fallon CountyMontana1,620.61,622.90.1%
415Jackson CountyColorado1,613.71,6210.4%
416Tripp CountySouth Dakota1,612.31,617.40.3%
417Matagorda CountyTexas1,093.11,612.532.2%
418Brazoria CountyTexas1,363.31,608.715.3%
419Le Flore CountyOklahoma1,589.41,608.61.2%
420Sanpete CountyUtah1,589.81,602.20.8%
421Huerfano CountyColorado1,5911,593.30.1%
422Levy CountyFlorida1,118.31,59129.7%
423Sanilac CountyMichigan962.61,589.939.5%
424Hidalgo CountyTexas1,571.21,582.80.7%
425Berrien CountyMichigan567.81,581.564.1%
426Worcester CountyMassachusetts1,510.71,579.24.3%
427Marathon CountyWisconsin1,545.21,576.32%
428Custer CountySouth Dakota1,556.91,559.10.1%
429Uvalde CountyTexas1,551.91,558.60.4%
430Erie CountyPennsylvania7991,558.148.7%
431Brevard CountyFlorida1,0151,55734.8%
432Emmons CountyNorth Dakota1,508.41,555.33%
433Marinette CountyWisconsin1,399.51,5509.7%
434Dare CountyNorth Carolina383.21,541.775.1%
435Bent CountyColorado1,512.81,541.11.8%
436Tom Green CountyTexas1,522.31,540.61.2%
437Fremont CountyColorado1,533.81,534.70.1%
438Vermilion ParishLouisiana1,172.11,53223.5%
439Stanley CountySouth Dakota1,444.41,517.24.8%
440Lee CountyFlorida781.21,514.848.4%
441Stanislaus CountyCalifornia1,496.21,514.11.2%
442Barnes CountyNorth Dakota1,491.61,513.41.4%
443Taylor CountyFlorida1,043.31,511.931%
444Cavalier CountyNorth Dakota1,489.11,509.81.4%
445Spink CountySouth Dakota1,503.51,509.70.4%
446Osceola CountyFlorida1,327.31,50611.9%
447Dallam CountyTexas1,503.41,505.10.1%
448Gaines CountyTexas1,502.41,502.90%
449Placer CountyCalifornia1,407.41,502.26.3%
450Houghton CountyMichigan1,009.11,501.532.8%
451Oldham CountyTexas1,500.51,501.40.1%
452Andrews CountyTexas1,500.71,501.10%
453Chautauqua CountyNew York1,060.41,500.229.3%
454Deaf Smith CountyTexas1,496.81,498.30.1%
455La Salle CountyTexas1,486.71,494.20.5%
456Manitowoc CountyWisconsin589.31,494.160.6%
457Carbon CountyUtah1,479.31,485.30.4%
458Douglas CountyWisconsin1,304.31,479.711.9%
459Gogebic CountyMichigan1,102.11,476.725.4%
460Washington CountyIdaho1,452.91,473.41.4%
461Lafourche ParishLouisiana1,069.71,468.427.2%
462Delaware CountyNew York1,442.61,467.41.7%
463Bay CountyFlorida758.61,466.748.3%
464Hartley CountyTexas1,4621,463.10.1%
465Mariposa CountyCalifornia1,448.81,462.81%
466Muskegon CountyMichigan503.91,46065.5%
467Hyde CountyNorth Carolina612.31,45958%
468Herkimer CountyNew York1,410.61,457.13.2%
469Sutton CountyTexas1,453.91,454.40%
470Liberty CountyMontana1,4301,447.11.2%
471Butler CountyKansas1,429.71,446.51.2%
472Richland CountyNorth Dakota1,435.71,445.30.7%
473Becker CountyMinnesota1,3151,445.29%
474Power CountyIdaho1,403.81,442.12.7%
475Hand CountySouth Dakota1,436.61,440.20.2%
476Grand Forks CountyNorth Dakota1,436.21,439.40.2%
477Benson CountyNorth Dakota1,388.61,439.43.5%
478Pine CountyMinnesota1,411.31,434.61.6%
479Kidder CountyNorth Dakota1,351.11,432.85.7%
480Volusia CountyFlorida1,101.31,432.523.1%
481Morrill CountyNebraska1,423.71,430.10.4%
482Wheatland CountyMontana1,422.51,427.50.4%
483Daniels CountyMontana1,426.31,426.70%
484San Joaquin CountyCalifornia1,392.31,426.62.4%
485Pend Oreille CountyWashington1,400.21,425.51.8%
486Pushmataha CountyOklahoma1,395.61,422.61.9%
487Franklin CountyFlorida5451,421.661.7%
488Walton CountyFlorida1,038.41,409.426.3%
489Curry CountyNew Mexico1,405.51,408.60.2%
490Steuben CountyNew York1,390.51,4041%
491Dawes CountyNebraska1,396.41,4010.3%
492Kings CountyCalifornia1,3911,392.20.1%
493Todd CountySouth Dakota1,388.61,390.90.2%
494San Benito CountyCalifornia1,388.71,390.50.1%
495Charlevoix CountyMichigan416.31,390.470.1%
496Stearns CountyMinnesota1,342.91,389.93.4%
497Wayne CountyNew York603.81,383.156.3%
498Pittsburg CountyOklahoma1,305.51,377.95.3%
499Adams CountyIdaho1,362.81,369.50.5%
500Lake CountyIllinois443.71,368.367.6%

Read the differences behind ranks 401–500

The median total area among these 100 entries is 1,501.472 mi². The first and last entries span 308.8 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

  • Texas13 entries · 13% of this page
  • Florida10 entries · 10% of this page
  • North Dakota9 entries · 9% of this page
  • Montana8 entries · 8% of this page
  • California7 entries · 7% of this page
  • Michigan7 entries · 7% of this page

The remaining 19 jurisdictions contribute 46 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.