The Largest Counties in the United States

The physically largest counties in the country, by the Census Bureau’s measured land area — shown beside how many parcels each county’s assessor actually records, which is its own story: the biggest counties are often the emptiest rolls.

#	County	Land area (acres)	Parcels on file	Median parcel	Govt-held parcels
1	Coconino County, AZ	11,914,465	78,720	0.7 ac	0.8%
2	Elko County, NV	10,990,913	45,083	2.1 ac	0.0%
3	Mohave County, AZ	8,532,555	264,223	0.8 ac	2.8%
4	Denali Borough, AK	8,090,271	3,035	3.9 ac	0.4%
5	Apache County, AZ	7,166,918	58,043	1.2 ac	1.2%
6	Sweetwater County, WY	6,673,267	26,558	1 ac	0.1%
7	Harney County, OR	6,486,040	10,827	39.2 ac	13.9%
8	Navajo County, AZ	6,367,677	85,943	0.8 ac	0.7%
9	Humboldt County, NV	6,170,107	17,787	5 ac	0.0%
10	Maricopa County, AZ	5,889,290	1,712,450	0.2 ac	0.5%
11	Fremont County, WY	5,877,502	24,666	1.2 ac	3.6%
12	Lake County, OR	5,208,710	18,042	5.1 ac	7.4%
13	Kern County, CA	5,206,191	421,684	0.2 ac	0.0%
14	Yavapai County, AZ	5,198,677	184,321	0.4 ac	2.3%
15	Carbon County, WY	5,054,557	17,562	0.2 ac	0.0%
16	Clark County, NV	5,050,663	911,489	0.1 ac	1.5%
17	Owyhee County, ID	4,907,650	9,382	5.2 ac	2.2%
18	Riverside County, CA	4,613,923	225,950	0.2 ac	2.1%
19	Park County, WY	4,440,985	17,687	1.1 ac	0.2%
20	Millard County, UT	4,342,708	16,419	5.4 ac	1.1%
21	Socorro County, NM	4,253,687	32,822	1 ac	1.1%
22	Siskiyou County, CA	4,018,411	53,426	2.4 ac	1.1%
23	St. Louis County, MN	3,998,797	185,033	1.1 ac	16.0%
24	Cochise County, AZ	3,974,312	124,494	0.8 ac	1.7%
25	Brewster County, TX	3,957,608	17,031	5.6 ac	0.6%
26	Pershing County, NV	3,863,417	12,112	21.8 ac	0.0%
27	Fresno County, CA	3,813,492	316,292	0.2 ac	0.0%
28	Klamath County, OR	3,807,934	61,080	1.1 ac	4.2%
29	Rio Arriba County, NM	3,750,959	34,125	1.3 ac	1.2%
30	Box Elder County, UT	3,700,034	48,017	0.8 ac	15.8%
31	McKinley County, NM	3,488,681	12,340	0.4 ac	1.9%
32	Pinal County, AZ	3,434,673	247,741	0.2 ac	1.1%
33	Natrona County, WY	3,417,944	41,188	0.2 ac	1.5%
34	Douglas County, OR	3,222,832	70,956	1.4 ac	3.5%
35	Churchill County, NV	3,168,100	13,861	1.3 ac	5.7%
36	Custer County, ID	3,150,193	6,595	3.1 ac	5.9%
37	Sublette County, WY	3,127,348	9,369	2.9 ac	3.6%
38	Lincoln County, NM	3,091,914	38,637	0.8 ac	0.0%
39	Tulare County, CA	3,087,296	157,279	0.2 ac	0.8%
40	Campbell County, WY	3,073,322	19,973	0.4 ac	0.1%
41	Las Animas County, CO	3,054,680	17,444	6.3 ac	2.6%
42	Pecos County, TX	3,048,854	11,982	5 ac	4.3%
43	Gila County, AZ	3,044,849	33,354	0.3 ac	2.5%
44	San Miguel County, NM	3,021,769	29,587	1.6 ac	1.8%
45	Hudspeth County, TX	2,925,131	21,508	19.2 ac	4.2%
46	Lane County, OR	2,914,619	157,634	0.2 ac	2.6%
47	La Paz County, AZ	2,877,811	15,851	0.4 ac	4.8%
48	Albany County, WY	2,735,472	17,967	0.3 ac	5.0%
49	Converse County, WY	2,723,196	9,536	2.1 ac	0.3%
50	San Diego County, CA	2,694,696	740,034	0.2 ac	0.0%
51	Sierra County, NM	2,675,977	15,787	0.5 ac	6.3%
52	Eddy County, NM	2,672,863	47,521	0.2 ac	12.0%
53	Eureka County, NV	2,672,440	4,540	10.6 ac	15.8%
54	Imperial County, CA	2,672,338	86,918	0.2 ac	0.2%
55	Johnson County, WY	2,658,657	6,295	2 ac	0.3%
56	Los Angeles County, CA	2,598,562	601,897	0.2 ac	0.8%
57	Weld County, CO	2,550,373	134,557	0.2 ac	1.8%
58	Grant County, NM	2,535,172	36,467	0.4 ac	4.8%
59	Modoc County, CA	2,526,869	32,472	1.1 ac	0.1%
60	Culberson County, TX	2,439,780	12,461	120.5 ac	2.1%
61	Doña Ana County, NM	2,437,234	90,047	0.3 ac	5.8%
62	Shasta County, CA	2,416,417	95,043	0.6 ac	4.2%
63	Colfax County, NM	2,405,105	12,965	0.8 ac	1.7%
64	Sandoval County, NM	2,374,524	148,221	0.5 ac	1.8%
65	Valley County, ID	2,345,676	25,237	0.6 ac	0.7%
66	Esmeralda County, NV	2,292,409	2,869	0.6 ac	7.0%
67	Humboldt County, CA	2,283,535	72,956	0.4 ac	5.3%
68	Mendocino County, CA	2,244,356	61,809	2.1 ac	0.0%
69	Meade County, SD	2,221,398	20,162	7.9 ac	1.8%
70	Hidalgo County, NM	2,200,672	7,484	9 ac	4.3%
71	Penobscot County, ME	2,174,199	42,144	0.7 ac	1.0%
72	Webb County, TX	2,151,359	94,200	0.1 ac	2.6%
73	Mesa County, CO	2,130,382	74,213	0.2 ac	2.6%
74	San Luis Obispo County, CA	2,112,539	129,540	0.2 ac	1.1%
75	Duchesne County, UT	2,070,735	31,022	4.9 ac	0.0%
76	Rio Blanco County, CO	2,061,421	5,018	0.8 ac	5.9%
77	Saguache County, CO	2,027,882	14,623	1.1 ac	7.4%
78	Val Verde County, TX	2,012,640	31,033	0.4 ac	2.3%
79	Koochiching County, MN	1,987,011	55,157	39.8 ac	2.3%
80	Baker County, OR	1,963,499	16,660	1.6 ac	5.7%
81	Guadalupe County, NM	1,939,054	3,468	1 ac	0.7%
82	Deschutes County, OR	1,931,270	99,151	0.3 ac	2.2%
83	Tehama County, CA	1,887,448	40,080	1.9 ac	5.4%
84	Garfield County, CO	1,886,352	27,575	0.3 ac	2.5%
85	Quay County, NM	1,839,331	16,247	80 ac	2.4%
86	Perkins County, SD	1,837,094	15,653	157.5 ac	5.5%
87	Crockett County, TX	1,796,687	8,841	249.9 ac	0.8%
88	Jackson County, OR	1,781,281	103,475	0.3 ac	0.0%
89	Pennington County, SD	1,777,130	54,201	0.4 ac	0.0%
90	Santa Barbara County, CA	1,749,722	127,241	0.2 ac	2.6%
91	Laramie County, WY	1,718,953	44,035	0.2 ac	0.0%
92	Harding County, SD	1,709,804	6,621	189.3 ac	21.8%
93	Itasca County, MN	1,707,210	77,819	5.1 ac	17.0%
94	Blaine County, ID	1,688,152	23,709	0.3 ac	6.4%
95	Shoshone County, ID	1,687,952	15,958	0.7 ac	4.8%
96	Reeves County, TX	1,686,626	14,057	5.7 ac	3.5%
97	Niobrara County, WY	1,680,658	3,779	70.8 ac	3.1%
98	Lincoln County, CO	1,649,747	8,597	0.2 ac	0.5%
99	Cassia County, ID	1,641,990	17,741	2 ac	3.3%
100	Lincoln County, NE	1,641,059	23,156	0.6 ac	4.8%

About These Figures

Land areas are the Census Bureau’s, so every county can be ranked regardless of what its assessor publishes. Parcel counts, median sizes (measured from mapped boundaries), and government shares come from each county’s own roll — details in the methodology. Only counties published on this site appear; see data sources for coverage.