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2026 Census Gazetteer

Largest counties by land area

All counties and county equivalents, including Alaska and Puerto Rico, ranked by land area. Alaska’s boroughs and census areas are included because they serve the same statistical level as counties.

Ranks 301–400

3,222 county equivalents · page 4 of 33

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What this part of the ranking shows

This page runs from Grays Harbor County, Washington at 1,902.268 mi² of land area to Oldham County, Texas at 1,500.523 mi² of land area. The 100 entries represent 23 state-level jurisdictions. Colorado has the most entries on this page (12).

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 land area, ranks 301 through 400. Areas in square miles.
RankCounty / equivalentStateLand mi²Total mi²Water share
301Grays Harbor CountyWashington1,902.32,223.614.5%
302Miami-Dade CountyFlorida1,9002,389.320.5%
303Boise CountyIdaho1,899.41,906.70.4%
304McHenry CountyNorth Dakota1,873.91,911.52%
305Klickitat CountyWashington1,871.61,904.41.7%
306Clackamas CountyOregon1,870.71,8830.7%
307Summit CountyUtah1,870.71,880.70.5%
308Judith Basin CountyMontana1,869.71,870.50%
309Musselshell CountyMontana1,8691,871.70.1%
310Bonneville CountyIdaho1,8661,900.31.8%
311Fremont CountyIdaho1,8641,896.21.7%
312Jackson CountySouth Dakota1,863.91,871.30.4%
313Sweet Grass CountyMontana1,855.51,862.30.4%
314Elbert CountyColorado1,850.81,8510%
315McCurtain CountyOklahoma1,850.81,902.52.7%
316Grand CountyColorado1,846.61,869.61.2%
317Greenlee CountyArizona1,842.81,847.50.2%
318Ventura CountyCalifornia1,840.82,206.616.6%
319Logan CountyColorado1,838.61,844.90.3%
320Cimarron CountyOklahoma1,834.81,8410.3%
321Mountrail CountyNorth Dakota1,825.21,941.56%
322Aitkin CountyMinnesota1,821.31,994.88.7%
323Douglas CountyWashington1,819.21,848.81.6%
324Beaver CountyOklahoma1,814.81,817.70.2%
325Haakon CountySouth Dakota1,810.51,826.90.9%
326Marquette CountyMichigan1,809.13,42547.2%
327Jefferson CountyWashington1,803.72,187.917.6%
328Polk CountyFlorida1,798.82,010.710.5%
329Stillwater CountyMontana1,796.51,805.80.5%
330Coos CountyNew Hampshire1,794.61,830.32%
331Essex CountyNew York1,794.11,916.36.4%
332Duval CountyTexas1,793.51,795.60.1%
333Jefferson CountyOregon1,781.71,791.80.6%
334Cheyenne CountyColorado1,778.31,781.40.2%
335Marshall CountyMinnesota1,775.11,812.92.1%
336Kiowa CountyColorado1,767.81,7861%
337Cass CountyNorth Dakota1,764.91,767.80.2%
338Spokane CountyWashington1,764.21,7810.9%
339Caribou CountyIdaho1,764.21,798.61.9%
340Clark CountyIdaho1,763.11,764.10.1%
341Fall River CountySouth Dakota1,739.91,749.20.5%
342Clallam CountyWashington1,738.82,66934.9%
343Prairie CountyMontana1,736.61,742.40.3%
344Bonner CountyIdaho1,733.21,918.19.6%
345Skagit CountyWashington1,730.21,9179.7%
346Granite CountyMontana1,727.21,732.80.3%
347Hamilton CountyNew York1,717.41,807.85%
348Wheeler CountyOregon1,7161,716.50%
349Brown CountySouth Dakota1,7131,7311%
350Grafton CountyNew Hampshire1,708.61,749.72.3%
351El Dorado CountyCalifornia1,707.81,786.44.4%
352Harris CountyTexas1,707.31,7773.9%
353Anchorage MunicipalityAlaska1,706.81,944.512.2%
354Garden CountyNebraska1,704.81,730.91.5%
355Benton CountyWashington1,700.11,759.73.4%
356Franklin CountyMaine1,6971,743.82.7%
357La Plata CountyColorado1,689.71,699.60.6%
358Eagle CountyColorado1,684.51,691.80.4%
359Sheridan CountyMontana1,676.91,705.91.7%
360Roseau CountyMinnesota1,671.71,678.30.4%
361Bottineau CountyNorth Dakota1,668.91,697.71.7%
362Pierce CountyWashington1,6681,805.57.6%
363Grant CountyNorth Dakota1,659.21,6660.4%
364Skamania CountyWashington1,658.31,686.61.7%
365Jefferson CountyMontana1,6571,659.40.1%
366Petroleum CountyMontana1,655.61,674.51.1%
367Lyman CountySouth Dakota1,642.31,706.93.8%
368Josephine CountyOregon1,638.61,640.80.1%
369Prowers CountyColorado1,638.41,644.30.4%
370Butte CountyCalifornia1,636.51,677.12.4%
371Burleigh CountyNorth Dakota1,632.71,668.52.1%
372Franklin CountyNew York1,629.31,697.54%
373Curry CountyOregon1,628.41,989.218.1%
374Pondera CountyMontana1,624.61,641.51%
375Fallon CountyMontana1,620.61,622.90.1%
376Jackson CountyColorado1,613.71,6210.4%
377Tripp CountySouth Dakota1,612.31,617.40.3%
378Coos CountyOregon1,596.11,806.411.6%
379Huerfano CountyColorado1,5911,593.30.1%
380Baldwin CountyAlabama1,589.92,027.321.6%
381Sanpete CountyUtah1,589.81,602.20.8%
382Le Flore CountyOklahoma1,589.41,608.61.2%
383Marion CountyFlorida1,588.41,662.74.5%
384Hancock CountyMaine1,587.22,344.932.3%
385Sonoma CountyCalifornia1,575.31,767.310.9%
386Hidalgo CountyTexas1,571.21,582.80.7%
387Chippewa CountyMichigan1,558.52,698.542.2%
388Custer CountySouth Dakota1,556.91,559.10.1%
389Uvalde CountyTexas1,551.91,558.60.4%
390Marathon CountyWisconsin1,545.21,576.32%
391Fremont CountyColorado1,533.81,534.70.1%
392Tom Green CountyTexas1,522.31,540.61.2%
393Bent CountyColorado1,512.81,541.11.8%
394Worcester CountyMassachusetts1,510.71,579.24.3%
395Emmons CountyNorth Dakota1,508.41,555.33%
396Spink CountySouth Dakota1,503.51,509.70.4%
397Dallam CountyTexas1,503.41,505.10.1%
398Gaines CountyTexas1,502.41,502.90%
399Andrews CountyTexas1,500.71,501.10%
400Oldham CountyTexas1,500.51,501.40.1%

Read the differences behind ranks 301–400

The median land area among these 100 entries is 1,708.226 mi². The first and last entries span 401.745 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

  • Colorado12 entries · 12% of this page
  • Montana11 entries · 11% of this page
  • Washington10 entries · 10% of this page
  • Texas9 entries · 9% of this page
  • South Dakota8 entries · 8% of this page
  • North Dakota7 entries · 7% of this page

The remaining 17 jurisdictions contribute 43 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.