OK · 2026 Census Gazetteer

Oklahoma counties by area

Official, comparable measurements for 77 counties and county equivalents.

Source fields preservedGEOID · ALAND · AWATER

County equivalents77

Combined land68,596.6 mi²

Combined water1,302.5 mi²

Largest by landOsage County

Understanding Oklahoma’s county areas

The land-area range runs from Marshall County at 371.5 mi² to Osage County at 2,246.7 mi². The largest has 6 times the land area of the smallest and accounts for 3.3% of the combined county land in Oklahoma.

The median county-equivalent land area is 802.7 mi², above the national median of 604.5 mi². The median describes the middle of the county size distribution; it does not describe how people or development are distributed. A state with a few very large counties can have a much smaller median than its largest entry suggests.

Where water changes the picture

McIntosh County has the most assigned water area, at 93.8 mi². It also has the highest water share, with water making up 13.2% of its total area. Water area and water percentage answer different questions: the first measures an amount, while the second measures the mix of land and water.

Across all 77 entries, water accounts for 1.9% of the combined total area. This is calculated from the summed land and water measurements, rather than averaging county percentages, which would give each small and large county equal weight.

Compare the largest and smallest county equivalents in Oklahoma to see land, water, and total area on the same scale.

These calculations use the 2026 Census county records listed below. County-equivalent boundaries vary between states; area alone does not measure population, density, or usable land. See coverage and calculation rules.

Complete area table

Sorted from largest to smallest land area.

#	County / equivalent	Land	Water	Water share
1	Osage CountyGEOID 40113	2,246.7 mi²	57.3 mi²	2.5%
2	Texas CountyGEOID 40139	2,041.3 mi²	7.4 mi²	0.4%
3	McCurtain CountyGEOID 40089	1,850.8 mi²	51.7 mi²	2.7%
4	Cimarron CountyGEOID 40025	1,834.8 mi²	6.1 mi²	0.3%
5	Beaver CountyGEOID 40007	1,814.8 mi²	2.8 mi²	0.2%
6	Le Flore CountyGEOID 40079	1,589.4 mi²	19.2 mi²	1.2%
7	Pushmataha CountyGEOID 40127	1,395.6 mi²	27 mi²	1.9%
8	Pittsburg CountyGEOID 40121	1,305.5 mi²	72.4 mi²	5.3%
9	Woods CountyGEOID 40151	1,286.5 mi²	3.5 mi²	0.3%
10	Caddo CountyGEOID 40015	1,277.8 mi²	12.4 mi²	1%
11	Woodward CountyGEOID 40153	1,242.8 mi²	3.7 mi²	0.3%
12	Ellis CountyGEOID 40045	1,231.5 mi²	0.4 mi²	0%
13	Roger Mills CountyGEOID 40129	1,141.1 mi²	5.3 mi²	0.5%
14	Grady CountyGEOID 40051	1,100.5 mi²	4.4 mi²	0.4%
15	Comanche CountyGEOID 40031	1,069.3 mi²	14.5 mi²	1.3%
16	Garfield CountyGEOID 40047	1,058.5 mi²	1.6 mi²	0.1%
17	Harper CountyGEOID 40059	1,038.6 mi²	2 mi²	0.2%
18	Kiowa CountyGEOID 40075	1,015.1 mi²	15.6 mi²	1.5%
19	Washita CountyGEOID 40149	1,003.1 mi²	5.6 mi²	0.6%
20	Grant CountyGEOID 40053	1,000.7 mi²	2.7 mi²	0.3%
21	Dewey CountyGEOID 40043	999.6 mi²	8.8 mi²	0.9%
22	Custer CountyGEOID 40039	988.8 mi²	13.3 mi²	1.3%
23	Atoka CountyGEOID 40005	975.5 mi²	14.4 mi²	1.5%
24	Major CountyGEOID 40093	955 mi²	3 mi²	0.3%
25	Lincoln CountyGEOID 40081	952.4 mi²	13.4 mi²	1.4%
26	Creek CountyGEOID 40037	949.9 mi²	19.6 mi²	2%
27	Blaine CountyGEOID 40011	928.5 mi²	10.4 mi²	1.1%
28	Kay CountyGEOID 40071	919.6 mi²	25.3 mi²	2.7%
29	Bryan CountyGEOID 40013	904.3 mi²	39.3 mi²	4.2%
30	Beckham CountyGEOID 40009	901.7 mi²	2.1 mi²	0.2%
31	Kingfisher CountyGEOID 40073	898.1 mi²	7.9 mi²	0.9%
32	Canadian CountyGEOID 40017	896.6 mi²	8.9 mi²	1%
33	Tillman CountyGEOID 40141	871.1 mi²	8.1 mi²	0.9%
34	Stephens CountyGEOID 40137	870.2 mi²	21.2 mi²	2.4%
35	Alfalfa CountyGEOID 40003	866.6 mi²	14.9 mi²	1.7%
36	Carter CountyGEOID 40019	822.3 mi²	11.5 mi²	1.4%
37	Muskogee CountyGEOID 40101	810.7 mi²	29.4 mi²	3.5%
38	Hughes CountyGEOID 40063	804.5 mi²	10.2 mi²	1.3%
39	Jackson CountyGEOID 40065	802.7 mi²	1.6 mi²	0.2%
40	Garvin CountyGEOID 40049	802.1 mi²	11.6 mi²	1.4%
41	Pottawatomie CountyGEOID 40125	787.8 mi²	5.7 mi²	0.7%
42	Choctaw CountyGEOID 40023	770.4 mi²	29.1 mi²	3.6%
43	Craig CountyGEOID 40035	761.3 mi²	1.4 mi²	0.2%
44	Jefferson CountyGEOID 40067	759 mi²	15.2 mi²	2%
45	Cherokee CountyGEOID 40021	749.1 mi²	26.9 mi²	3.5%
46	Logan CountyGEOID 40083	743.7 mi²	5.1 mi²	0.7%
47	Delaware CountyGEOID 40041	737.7 mi²	54.3 mi²	6.9%
48	Noble CountyGEOID 40103	731.7 mi²	10.9 mi²	1.5%
49	Latimer CountyGEOID 40077	722.1 mi²	7 mi²	1%
50	Pontotoc CountyGEOID 40123	720.4 mi²	4.9 mi²	0.7%
51	Oklahoma CountyGEOID 40109	708.9 mi²	9.5 mi²	1.3%
52	Okmulgee CountyGEOID 40111	697.4 mi²	5 mi²	0.7%
53	Payne CountyGEOID 40119	684.9 mi²	12.4 mi²	1.8%
54	Rogers CountyGEOID 40131	675.7 mi²	35.9 mi²	5%
55	Sequoyah CountyGEOID 40135	673.6 mi²	40.6 mi²	5.7%
56	Mayes CountyGEOID 40097	655.3 mi²	28.2 mi²	4.1%
57	Johnston CountyGEOID 40069	643.1 mi²	15.3 mi²	2.3%
58	Greer CountyGEOID 40055	639.3 mi²	4.3 mi²	0.7%
59	Seminole CountyGEOID 40133	632.8 mi²	7.7 mi²	1.2%
60	Cotton CountyGEOID 40033	632.6 mi²	9.3 mi²	1.4%
61	Okfuskee CountyGEOID 40107	618.5 mi²	10.3 mi²	1.6%
62	McIntosh CountyGEOID 40091	618.3 mi²	93.8 mi²	13.2%
63	Haskell CountyGEOID 40061	576.7 mi²	48.7 mi²	7.8%
64	Adair CountyGEOID 40001	573.9 mi²	3.4 mi²	0.6%
65	McClain CountyGEOID 40087	570.7 mi²	9.5 mi²	1.6%
66	Tulsa CountyGEOID 40143	570.2 mi²	16.7 mi²	2.8%
67	Pawnee CountyGEOID 40117	568.3 mi²	26.6 mi²	4.5%
68	Nowata CountyGEOID 40105	565.8 mi²	15 mi²	2.6%
69	Wagoner CountyGEOID 40145	561.9 mi²	28.9 mi²	4.9%
70	Cleveland CountyGEOID 40027	538.9 mi²	19 mi²	3.4%
71	Harmon CountyGEOID 40057	537.3 mi²	1.5 mi²	0.3%
72	Coal CountyGEOID 40029	516.8 mi²	4.7 mi²	0.9%
73	Love CountyGEOID 40085	513.9 mi²	18.3 mi²	3.4%
74	Ottawa CountyGEOID 40115	470.8 mi²	13.8 mi²	2.8%
75	Murray CountyGEOID 40099	416.4 mi²	8.8 mi²	2.1%
76	Washington CountyGEOID 40147	415.5 mi²	8.8 mi²	2.1%
77	Marshall CountyGEOID 40095	371.5 mi²	55.5 mi²	13%

How to read this table. Land and water areas are Census statistical measurements in square miles. Adding county rows can differ slightly from separately published state totals because of rounding and geographic treatment.