Iowa Counties (GeoWorld)

County Basics

The tables below feature information about every in . (Note: Louisiana is divided into parishes, Alaska into boroughs.) The first table lists each ’s name, the seat, area in square miles, area in square kilometers (km), population density (number of people per square mile), density per square kilometer (km) and population. County (or parish, borough) seats that also serve as state capitals are highlighted in yellow. The second table focuses on race.

You can see this information for all fifty states at Reference > North America > USA > Counties. Also, see the Counties home page.

See a map of ’s counties: Resizeable Pop-Up | Link

Name	Seat	Area	(km)	Density	(km)	Pop(2000)	Pop(1990)
Adair	Greenfield	569	1,475	15	6	8,243	8,409
Adams	Corning	424	1,097	12	4	4,482	4,866
Allamakee	Waukon	640	1,657	22	8	14,675	13,855
Appanoose	Centerville	496	1,285	28	11	13,721	13,743
Audubon	Audubon	443	1,148	17	6	6,830	7,334
Benton	Vinton	717	1,856	31	12	25,308	22,429
Black Hawk	Waterloo	567	1,470	218	84	128,012	123,798
Boone	Boone	572	1,480	44	17	26,224	25,186
Bremer	Waverly	438	1,134	52	20	23,325	22,813
Buchanan	Independence	571	1,480	37	14	21,093	20,844
Buena Vista	Storm Lake	575	1,489	35	13	20,411	19,965
Butler	Allison	580	1,503	27	11	15,305	15,731
Calhoun	Rockwell City	570	1,477	20	8	11,115	11,508
Carroll	Carroll	569	1,475	38	15	21,421	21,423
Cass	Atlantic	564	1,462	27	10	14,684	15,128
Cedar	Tipton	580	1,501	30	12	18,187	17,381
Cerro Gordo	Mason City	568	1,472	82	32	46,447	46,733
Cherokee	Cherokee	577	1,495	24	9	13,035	14,098
Chickasaw	New Hampton	505	1,307	26	10	13,095	13,295
Clarke	Osceola	431	1,117	19	7	9,133	8,287
Clay	Spencer	569	1,474	31	12	17,372	17,585
Clayton	Elkader	779	2,017	25	9	18,678	19,054
Clinton	Clinton	695	1,800	73	28	50,149	51,040
Crawford	Denison	714	1,850	24	9	16,942	16,775
Dallas	Adel	587	1,519	51	20	40,750	29,755
Davis	Bloomfield	503	1,304	17	6	8,541	8,312
Decatur	Leon	532	1,379	16	6	8,689	8,338
Delaware	Manchester	578	1,497	31	12	18,404	18,035
Des Moines	Burlington	416	1,078	102	40	42,351	42,614
Dickinson	Spirit Lake	381	987	39	15	16,424	14,909
Dubuque	Dubuque	608	1,575	142	55	89,143	86,403
Emmet	Estherville	396	1,025	29	11	11,027	11,569
Fayette	West Union	731	1,893	30	12	22,008	21,843
Floyd	Charles City	501	1,297	34	13	16,900	17,058
Franklin	Hampton	583	1,509	20	8	10,704	11,364
Fremont	Sidney	511	1,324	16	6	8,010	8,226
Greene	Jefferson	568	1,472	18	7	10,366	10,045
Grundy	Grundy Center	503	1,302	24	9	12,369	12,029
Guthrie	Guthrie Center	591	1,530	19	7	11,353	10,935
Hamilton	Webster City	577	1,494	28	11	16,438	16,071
Hancock	Garner	571	1,479	22	9	12,100	12,638
Hardin	Eldora	569	1,475	34	13	18,812	19,094
Harrison	Logan	697	1,805	21	8	15,666	14,730
Henry	Mount Pleasant	435	1,125	44	17	20,336	19,226
Howard	Cresco	473	1,226	21	8	9,932	9,809
Humboldt	Dakota City	434	1,125	25	10	10,381	10,756
Ida	Ida Grove	432	1,118	19	8	7,837	8,365
Iowa	Marengo	587	1,519	25	10	15,671	14,630
Jackson	Maquoketa	636	1,648	31	12	20,296	19,950
Jasper	Newton	730	1,891	48	18	37,213	34,795
Jefferson	Fairfield	435	1,128	38	15	16,181	16,310
Johnson	Iowa City	615	1,592	156	60	111,006	96,119
Jones	Anamosa	575	1,490	34	13	20,221	19,444
Keokuk	Sigourney	579	1,500	20	8	11,400	11,624
Kossuth	Algona	973	2,520	19	7	17,163	18,591
Lee	Fort Madison & Keokuk	517	1,340	75	29	38,052	38,687
Linn	Cedar Rapids	718	1,858	235	91	191,701	168,767
Louisa	Wapello	402	1,041	29	11	12,183	11,592
Lucas	Chariton	431	1,115	21	8	9,422	9,070
Lyon	Rock Rapids	588	1,522	20	8	11,763	11,952
Madison	Winterset	561	1,453	22	9	14,019	12,483
Mahaska	Oskaloosa	571	1,479	38	15	22,335	21,522
Marion	Knoxville	554	1,436	54	21	32,052	30,001
Marshall	Marshalltown	572	1,482	67	26	39,311	38,276
Mills	Glenwood	437	1,131	30	12	14,547	13,202
Mitchell	Osage	469	1,215	23	9	10,874	10,928
Monona	Onawa	693	1,795	15	6	10,020	10,034
Monroe	Albia	433	1,123	19	7	8,016	8,114
Montgomery	Red Oak	424	1,098	29	11	11,771	12,076
Muscatine	Muscatine	439	1,136	91	35	41,722	39,907
O’Brien	Primghar	573	1,484	27	10	15,102	15,444
Osceola	Sibley	399	1,033	18	7	7,003	7,267
Page	Clarinda	535	1,385	32	12	16,976	16,870
Palo Alto	Emmetsburg	564	1,460	19	7	10,147	10,669
Plymouth	Le Mars	864	2,237	27	11	24,849	23,388
Pocahontas	Pocahontas	578	1,496	17	6	8,662	9,525
Polk	Des Moines	570	1,475	575	222	374,601	327,140
Pottawattamie	Council Bluffs & Avoca	954	2,472	87	33	87,704	82,628
Poweshiek	Montezuma	585	1,515	33	13	18,815	19,033
Ringgold	Mount Ayr	538	1,393	10	4	5,469	5,420
Sac	Sac City	576	1,491	21	8	11,529	12,324
Scott	Davenport	458	1,186	330	127	158,668	150,979
Shelby	Harlan	591	1,531	22	9	13,173	13,230
Sioux	Orange City	768	1,989	39	15	31,589	29,903
Story	Nevada	573	1,484	130	50	79,981	74,252
Tama	Toledo	721	1,868	24	9	18,103	17,419
Taylor	Bedford	534	1,383	13	5	6,958	7,114
Union	Creston	424	1,099	30	12	12,309	12,750
Van Buren	Keosauqua	485	1,257	16	6	7,809	7,676
Wapello	Ottumwa	432	1,119	83	32	36,051	35,687
Warren	Indianola	572	1,481	63	24	40,671	36,033
Washington	Washington	569	1,473	35	13	20,670	19,612
Wayne	Corydon	526	1,361	13	5	6,730	7,067
Webster	Fort Dodge	715	1,853	56	22	40,235	40,342
Winnebago	Forest City	401	1,037	30	12	11,723	12,122
Winneshiek	Decorah	690	1,786	30	12	21,310	20,847
Woodbury	Sioux City	873	2,260	113	44	103,877	98,276
Worth	Northwood	400	1,036	20	8	7,909	7,991
Wright	Clarion	581	1,504	25	10	14,334	14,269

(Source: U.S. Census Bureau)

Race

The table below lists the population of various ethnic and cultural groups in : Native American (American Indian, Eskimo and Aleut), white (Caucasian), black (African American), Asian American, Pacific Islander, “Some Other Race,” people whose ancestry includes two or more races, and Hispanic.

County	Native	White	Black	Asian	PI	Other	Race2	Hisp
Adair	6	8,153	6	19	0	19	40	58
Adams	20	4,433	3	8	0	2	16	26
Allamakee	26	14,070	21	39	2	414	103	520
Appanoose	23	13,469	58	36	1	37	97	135
Audubon	6	6,773	10	13	0	2	26	33
Benton	37	25,015	51	43	4	27	131	156
Black Hawk	228	113,194	10,179	1,254	56	1,190	1,911	2,359
Boone	53	25,838	95	57	0	67	114	218
Bremer	15	22,909	112	121	5	24	139	130
Buchanan	45	20,757	57	85	1	34	114	131
Buena Vista	27	17,962	72	884	3	1,174	289	2,560
Butler	8	15,145	13	31	3	24	81	89
Calhoun	22	10,899	77	20	1	38	58	100
Carroll	22	21,178	38	73	1	43	66	115
Cass	18	14,513	31	20	6	46	50	101
Cedar	34	17,909	34	55	5	47	103	171
Cerro Gordo	79	44,711	373	324	9	410	541	1,291
Cherokee	21	12,817	41	56	0	48	52	124
Chickasaw	4	12,931	7	35	1	38	79	82
Clarke	30	8,826	10	32	3	179	53	369
Clay	17	17,039	30	142	5	44	95	196
Clayton	41	18,478	26	20	1	35	77	142
Clinton	120	48,079	946	283	9	172	540	627
Crawford	47	15,773	129	83	2	777	131	1,482
Dallas	62	38,609	300	282	18	1,135	344	2,199
Davis	18	8,400	15	17	4	18	69	61
Decatur	21	8,381	85	55	10	40	97	148
Delaware	18	18,271	13	26	2	19	55	121
Des Moines	104	39,679	1,511	251	16	289	501	740
Dickinson	34	16,244	29	30	1	16	70	109
Dubuque	131	86,531	767	514	76	447	677	1,065
Emmet	31	10,738	26	33	1	138	60	475
Fayette	29	21,505	116	87	7	94	170	330
Floyd	16	16,581	39	72	16	75	101	222
Franklin	25	10,160	9	17	2	434	57	642
Fremont	19	7,851	3	19	0	77	41	174
Greene	16	10,175	15	25	1	69	65	172
Grundy	3	12,242	10	36	0	19	59	72
Guthrie	6	11,195	14	16	5	48	69	120
Hamilton	33	15,898	38	240	1	100	128	234
Hancock	12	11,822	11	37	2	167	49	301
Hardin	24	18,274	116	60	9	234	95	455
Harrison	34	15,460	13	25	2	32	100	113
Henry	49	19,274	302	383	5	106	217	256
Howard	15	9,839	11	17	0	8	42	55
Humboldt	6	10,239	11	24	10	42	49	100
Ida	5	7,760	8	19	0	12	33	37
Iowa	10	15,467	27	47	4	56	60	152
Jackson	24	20,085	20	19	23	30	95	121
Jasper	81	36,313	309	162	19	98	231	375
Jefferson	27	15,537	104	275	6	85	147	297
Johnson	313	100,051	3,223	4,578	48	1,116	1,677	2,781
Jones	64	19,549	361	44	0	46	157	213
Keokuk	13	11,286	8	26	2	24	41	61
Kossuth	25	16,950	19	60	1	50	58	139
Lee	99	35,862	1,066	150	22	392	461	902
Linn	418	179,999	4,919	2,634	91	881	2,759	2,722
Louisa	22	11,441	31	24	3	555	107	1,537
Lucas	10	9,275	12	28	1	35	61	82
Lyon	17	11,661	11	18	1	12	43	42
Madison	38	13,818	12	25	3	27	96	105
Mahaska	43	21,710	142	192	6	68	174	190
Marion	61	31,237	134	331	12	71	206	257
Marshall	136	35,551	365	308	22	2,371	558	3,523
Mills	39	14,251	41	42	2	52	120	179
Mitchell	8	10,795	19	19	2	8	23	63
Monona	76	9,854	8	12	4	8	58	70
Monroe	29	7,888	16	32	0	10	41	40
Montgomery	41	11,559	9	29	1	80	52	153
Muscatine	128	37,852	294	345	7	2,525	571	4,973
O’Brien	25	14,807	52	77	1	71	69	267
Osceola	18	6,866	8	14	1	59	37	125
Page	83	16,315	282	81	2	83	130	265
Palo Alto	19	10,007	9	31	4	19	58	77
Plymouth	36	24,393	72	66	14	115	153	328
Pocahontas	15	8,531	21	15	1	26	53	77
Polk	1,001	330,917	18,113	9,858	209	8,299	6,204	16,490
Pottawattamie	325	84,181	671	423	17	1,116	971	2,892
Poweshiek	44	18,202	103	202	9	92	163	226
Ringgold	12	5,418	6	9	0	1	23	13
Sac	10	11,359	30	16	2	46	66	111
Scott	500	140,481	9,689	2,502	32	2,606	2,858	6,445
Shelby	38	12,999	13	36	0	24	63	88
Sioux	40	30,746	64	186	4	380	169	808
Story	128	72,898	1,463	4,080	25	478	909	1,238
Tama	1,102	16,362	46	32	4	344	213	679
Taylor	7	6,799	2	21	4	79	46	265
Union	21	12,117	28	31	0	40	72	125
Van Buren	14	7,701	5	22	5	12	50	60
Wapello	102	34,709	337	233	7	379	284	799
Warren	71	39,889	108	156	18	118	311	441
Washington	40	20,059	60	51	7	312	141	564
Wayne	8	6,648	4	10	4	13	43	48
Webster	119	37,574	1,364	267	7	442	462	944
Winnebago	27	11,415	21	84	1	118	57	237
Winneshiek	16	20,852	108	174	1	52	107	170
Woodbury	1,753	90,875	2,097	2,501	43	4,538	2,070	9,468
Worth	7	7,780	22	11	1	33	55	124
Wright	26	13,750	24	28	0	415	91	706

(Source: U.S. Census Bureau)

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