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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 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 Richland County, Montana at 2,103.476 mi² of total area to Roseau County, Minnesota at 1,678.273 mi² of total area. The 100 entries represent 26 state-level jurisdictions. Montana has the most entries on this page (10).

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 301 through 400. Areas in square miles.
RankCounty / equivalentStateLand mi²Total mi²Water share
301Richland CountyMontana2,084.62,103.50.9%
302Mackinac CountyMichigan1,021.92,100.651.4%
303Oglala Lakota CountySouth Dakota2,093.62,096.40.1%
304Uinta CountyWyoming2,081.72,088.10.3%
305Terrebonne ParishLouisiana1,229.92,082.240.9%
306Dunn CountyNorth Dakota2,008.62,082.13.5%
307Sioux CountyNebraska2,066.72,067.40%
308Carbon CountyMontana2,047.92,061.40.7%
309Ward CountyNorth Dakota2,0132,0562.1%
310Texas CountyOklahoma2,041.32,048.70.4%
311Morrow CountyOregon2,030.52,047.70.8%
312Bayfield CountyWisconsin1,477.92,041.727.6%
313Montezuma CountyColorado2,029.32,039.90.5%
314Union CountyOregon2,036.92,038.80.1%
315Baldwin CountyAlabama1,589.92,027.321.6%
316Lyon CountyNevada2,003.12,0261.1%
317Polk CountyFlorida1,798.82,010.710.5%
318Hot Springs CountyWyoming2,004.42,006.40.1%
319Polk CountyMinnesota1,9711,997.81.3%
320Aitkin CountyMinnesota1,821.31,994.88.7%
321Delta CountyMichigan1,171.11,991.341.2%
322Curry CountyOregon1,628.41,989.218.1%
323Merced CountyCalifornia1,9381,978.72.1%
324Ziebach CountySouth Dakota1,961.21,970.60.5%
325Kenedy CountyTexas1,458.61,945.825%
326Morton CountyNorth Dakota1,925.91,945.21%
327Toole CountyMontana1,914.91,9451.5%
328Anchorage MunicipalityAlaska1,706.81,944.512.2%
329Mountrail CountyNorth Dakota1,825.21,941.56%
330Cameron ParishLouisiana1,290.71,936.733.4%
331Adams CountyWashington1,9251,929.80.2%
332Twin Falls CountyIdaho1,921.71,928.70.4%
333Mora CountyNew Mexico1,926.31,928.60.1%
334Sevier CountyUtah1,910.51,918.30.4%
335Bonner CountyIdaho1,733.21,918.19.6%
336Skagit CountyWashington1,730.21,9179.7%
337Essex CountyNew York1,794.11,916.36.4%
338Luce CountyMichigan899.11,912.553%
339McHenry CountyNorth Dakota1,873.91,911.52%
340Santa Fe CountyNew Mexico1,910.41,911.40.1%
341Boise CountyIdaho1,899.41,906.70.4%
342Klickitat CountyWashington1,871.61,904.41.7%
343McCurtain CountyOklahoma1,850.81,902.52.7%
344Bonneville CountyIdaho1,8661,900.31.8%
345Fremont CountyIdaho1,8641,896.21.7%
346Iosco CountyMichigan549.51,890.170.9%
347Schoolcraft CountyMichigan1,171.91,883.937.8%
348Clackamas CountyOregon1,870.71,8830.7%
349Summit CountyUtah1,870.71,880.70.5%
350Musselshell CountyMontana1,8691,871.70.1%
351Jackson CountySouth Dakota1,863.91,871.30.4%
352Judith Basin CountyMontana1,869.71,870.50%
353Grand CountyColorado1,846.61,869.61.2%
354Sweet Grass CountyMontana1,855.51,862.30.4%
355Jefferson CountyNew York1,267.91,856.631.7%
356Elbert CountyColorado1,850.81,8510%
357Douglas CountyWashington1,819.21,848.81.6%
358Greenlee CountyArizona1,842.81,847.50.2%
359Logan CountyColorado1,838.61,844.90.3%
360Cimarron CountyOklahoma1,834.81,8410.3%
361Allegan CountyMichigan825.41,833.355%
362Coos CountyNew Hampshire1,794.61,830.32%
363Haakon CountySouth Dakota1,810.51,826.90.9%
364Beaver CountyOklahoma1,814.81,817.70.2%
365Marshall CountyMinnesota1,775.11,812.92.1%
366Hamilton CountyNew York1,717.41,807.85%
367Coos CountyOregon1,596.11,806.411.6%
368Stillwater CountyMontana1,796.51,805.80.5%
369Pierce CountyWashington1,6681,805.57.6%
370Caribou CountyIdaho1,764.21,798.61.9%
371Duval CountyTexas1,793.51,795.60.1%
372Jefferson CountyOregon1,781.71,791.80.6%
373Alcona CountyMichigan674.71,790.662.3%
374El Dorado CountyCalifornia1,707.81,786.44.4%
375Kiowa CountyColorado1,767.81,7861%
376Cheyenne CountyColorado1,778.31,781.40.2%
377Spokane CountyWashington1,764.21,7810.9%
378Lake of the Woods CountyMinnesota1,297.71,779.827.1%
379Harris CountyTexas1,707.31,7773.9%
380Cass CountyNorth Dakota1,764.91,767.80.2%
381Sonoma CountyCalifornia1,575.31,767.310.9%
382Clark CountyIdaho1,763.11,764.10.1%
383Benton CountyWashington1,700.11,759.73.4%
384Grafton CountyNew Hampshire1,708.61,749.72.3%
385Fall River CountySouth Dakota1,739.91,749.20.5%
386Franklin CountyMaine1,6971,743.82.7%
387Prairie CountyMontana1,736.61,742.40.3%
388Granite CountyMontana1,727.21,732.80.3%
389Brown CountySouth Dakota1,7131,7311%
390Garden CountyNebraska1,704.81,730.91.5%
391Wheeler CountyOregon1,7161,716.50%
392Lyman CountySouth Dakota1,642.31,706.93.8%
393Sheridan CountyMontana1,676.91,705.91.7%
394La Plata CountyColorado1,689.71,699.60.6%
395Bottineau CountyNorth Dakota1,668.91,697.71.7%
396Franklin CountyNew York1,629.31,697.54%
397Alpena CountyMichigan571.91,694.966.3%
398Eagle CountyColorado1,684.51,691.80.4%
399Skamania CountyWashington1,658.31,686.61.7%
400Roseau CountyMinnesota1,671.71,678.30.4%

Read the differences behind ranks 301–400

The median total area among these 100 entries is 1,871.484 mi². The first and last entries span 425.203 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

  • Montana10 entries · 10% of this page
  • Colorado8 entries · 8% of this page
  • Michigan8 entries · 8% of this page
  • Washington8 entries · 8% of this page
  • Idaho7 entries · 7% of this page
  • North Dakota7 entries · 7% of this page

The remaining 20 jurisdictions contribute 52 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.