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RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Black population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Black or African American (2020 American Community Survey). A concentration measure: Black residents as a percentage of total population. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide. The median across all 99 is 0.7%.

Highest Black population share by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPBLACKVS 2000
01Black Hawk County, IAIA131,53210.3%+2.4 pts
02Johnson County, IAIA160,0448.3%+5.4 pts
03Scott County, IAIA175,2597.8%+1.9 pts
04Polk County, IAIA516,5467.1%+2.3 pts
05Linn County, IAIA232,0287.0%+4.5 pts
06Des Moines County, IAIA38,0776.4%+2.9 pts
07Webster County, IAIA36,8384.8%+1.5 pts
08Woodbury County, IAIA106,6494.8%+2.9 pts
09Wapello County, IAIA35,2104.1%+3.2 pts
10Dubuque County, IAIA99,3814.1%+3.2 pts
11Story County, IAIA101,2913.0%+1.2 pts
12Clinton County, IAIA46,0023.0%+1.1 pts
13Buena Vista County, IAIA20,4492.7%+2.4 pts
14Lee County, IAIA32,3062.7%−0.1 pts
15Dallas County, IAIA118,4572.7%+2.0 pts
16Floyd County, IAIA14,9012.7%+2.4 pts
17Jefferson County, IAIA15,2912.6%+2.0 pts
18Muscatine County, IAIA41,8532.5%+1.9 pts
19Henry County, IAIA19,3492.4%+1.0 pts
20Page County, IAIA14,8562.4%+0.8 pts
21Crawford County, IAIA16,2372.3%+1.6 pts
22Jones County, IAIA21,2532.1%+0.4 pts
23Cerro Gordo County, IAIA42,3722.0%+1.2 pts
24Pottawattamie County, IAIA92,9962.0%+1.2 pts
25Marshall County, IAIA39,8902.0%+1.1 pts
26Winnebago County, IAIA10,2511.9%+1.7 pts
27Jasper County, IAIA38,1531.8%+1.0 pts
28Mahaska County, IAIA21,8801.7%+1.1 pts
29Poweshiek County, IAIA18,3681.7%+1.2 pts
30Calhoun County, IAIA9,5621.5%+0.8 pts
31Plymouth County, IAIA25,6971.4%+1.1 pts
32Decatur County, IAIA7,6551.3%+0.4 pts
33Carroll County, IAIA20,3031.3%+1.1 pts
34O'Brien County, IAIA14,2201.1%+0.8 pts
35Boone County, IAIA26,7991.1%+0.8 pts
36Allamakee County, IAIA14,2381.0%+0.9 pts
37Fayette County, IAIA19,0471.0%+0.5 pts
38Bremer County, IAIA25,2961.0%+0.5 pts
39Emmet County, IAIA9,1070.9%+0.7 pts
40Union County, IAIA11,8290.9%+0.7 pts
41Pocahontas County, IAIA6,8190.9%+0.7 pts
42Clayton County, IAIA16,8450.9%+0.8 pts
43Warren County, IAIA57,3310.9%+0.6 pts
44Hardin County, IAIA16,4550.9%+0.3 pts
45Marion County, IAIA34,1920.8%+0.4 pts
46Worth County, IAIA7,3380.8%+0.5 pts
47Washington County, IAIA22,6670.8%+0.5 pts
48Tama County, IAIA16,7960.7%+0.5 pts
49Cherokee County, IAIA11,3690.7%+0.4 pts
50Jackson County, IAIA19,2880.7%+0.6 pts
51Hancock County, IAIA10,5280.7%+0.6 pts
52Delaware County, IAIA17,6740.7%+0.6 pts
53Louisa County, IAIA10,4160.7%+0.5 pts
54Iowa County, IAIA16,5040.7%+0.5 pts
55Chickasaw County, IAIA11,6630.6%+0.6 pts
56Appanoose County, IAIA12,0770.6%+0.2 pts
57Clay County, IAIA16,2020.6%+0.4 pts
58Adair County, IAIA7,4030.6%+0.5 pts
59Winneshiek County, IAIA19,7330.6%+0.1 pts
60Hamilton County, IAIA14,9440.6%+0.4 pts
61Palo Alto County, IAIA8,8990.6%+0.5 pts
62Wright County, IAIA12,8010.6%+0.4 pts
63Humboldt County, IAIA9,4090.6%+0.5 pts
64Mills County, IAIA14,7930.5%+0.2 pts
65Sioux County, IAIA36,7740.5%+0.3 pts
66Kossuth County, IAIA14,3220.5%+0.4 pts
67Sac County, IAIA9,5250.5%+0.2 pts
68Keokuk County, IAIA9,7970.5%+0.4 pts
69Osceola County, IAIA5,9800.5%+0.3 pts
70Shelby County, IAIA11,6890.5%+0.4 pts
71Clarke County, IAIA9,5740.4%+0.3 pts
72Benton County, IAIA26,0040.4%+0.2 pts
73Dickinson County, IAIA18,0770.4%+0.3 pts
74Cedar County, IAIA18,3590.4%+0.2 pts
75Ida County, IAIA6,7770.4%+0.3 pts
76Mitchell County, IAIA10,6500.4%+0.2 pts
77Van Buren County, IAIA7,1310.4%+0.3 pts
78Grundy County, IAIA12,3610.3%+0.3 pts
79Buchanan County, IAIA20,8830.3%+0.1 pts
80Adams County, IAIA3,6170.3%+0.3 pts
81Monona County, IAIA8,5390.3%+0.2 pts
82Franklin County, IAIA9,8680.3%+0.2 pts
83Lyon County, IAIA12,3540.3%+0.2 pts
84Audubon County, IAIA5,5090.3%+0.2 pts
85Madison County, IAIA17,2700.3%+0.2 pts
86Guthrie County, IAIA10,7820.3%+0.1 pts
87Greene County, IAIA8,6580.3%+0.1 pts
88Howard County, IAIA9,4150.2%+0.1 pts
89Montgomery County, IAIA10,0020.2%+0.2 pts
90Monroe County, IAIA7,4060.2%0.0 pts
91Cass County, IAIA12,9600.2%0.0 pts
92Lucas County, IAIA8,8470.2%+0.1 pts
93Harrison County, IAIA14,6230.2%+0.1 pts
94Butler County, IAIA14,0490.2%+0.1 pts
95Wayne County, IAIA6,7380.2%+0.1 pts
96Fremont County, IAIA6,5220.2%+0.1 pts
97Davis County, IAIA9,2300.1%−0.1 pts
98Ringgold County, IAIA4,6420.0%−0.1 pts
99Taylor County, IAIA5,8350.0%0.0 pts
SHOWING 1–99 OF 99

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS