Counties in Iowa by births (July to June)

Name: Counties in Iowa by births (July to June), 2021
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Polk County had the highest births (July to June) of 99 counties in 2021, at 6,308. Adams County had the lowest, at 43. The median was 165 and the figure for Iowa was 35,845. Source: the U.S. Census Bureau.

Highest6,308Polk County

Lowest43Adams County

Median16599 counties

Iowa35,845History

Top 40 counties, 2021

CSV Chart (SVG)

count. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

Rank	Counties	2021 count
1	Polk County Estimated	6,308
2	Linn County Estimated	2,531
3	Scott County Estimated	1,856
4	Johnson County Estimated	1,631
5	Black Hawk County Estimated	1,608
6	Woodbury County Estimated	1,386
7	Dallas County Estimated	1,336
8	Dubuque County Estimated	1,068
9	Pottawattamie County Estimated	961
10	Story County Estimated	775
11	Warren County Estimated	572
12	Clinton County Estimated	499
13	Sioux County Estimated	488
14	Marshall County Estimated	475
15	Muscatine County Estimated	450
16	Wapello County Estimated	448
17	Cerro Gordo County Estimated	418
18	Webster County Estimated	411
19	Des Moines County Estimated	401
20	Jasper County Estimated	388
21	Marion County Estimated	361
22	Lee County Estimated	346
23	Washington County Estimated	312
24	Buena Vista County Estimated	309
25	Plymouth County Estimated	294
26	Buchanan County Estimated	274
27	Benton County Estimated	267
28	Boone County Estimated	263
29	Mahaska County Estimated	239
30	Bremer County Estimated	237
31	Carroll County Estimated	226
32	Crawford County Estimated	214
33	Jackson County Estimated	206
34	Delaware County Estimated	201
35	Tama County Estimated	200
36	Jones County Estimated	199
37	Clayton County Estimated	193
38	Allamakee County Estimated	189
39	Winneshiek County Estimated	187
40	Poweshiek County Estimated	184
41	Fayette County Estimated	182
42	Henry County Estimated	179
43	O'Brien County Estimated	177
44	Madison County Estimated	176
45	Dickinson County Estimated	172
46	Clay County Estimated	171
47	Cedar County Estimated	168
48	Floyd County Estimated	166
48	Iowa County Estimated	166
50	Kossuth County Estimated	165
51	Davis County Estimated	161
52	Lyon County Estimated	160
53	Hamilton County Estimated	153
54	Harrison County Estimated	152
54	Jefferson County Estimated	152
56	Wright County Estimated	150
57	Franklin County Estimated	146
58	Page County Estimated	139
59	Mills County Estimated	136
60	Hardin County Estimated	134
61	Cherokee County Estimated	131
62	Appanoose County Estimated	130
62	Butler County Estimated	130
64	Cass County Estimated	129
64	Howard County Estimated	129
66	Mitchell County Estimated	127
67	Chickasaw County Estimated	125
68	Grundy County Estimated	122
68	Hancock County Estimated	122
70	Clarke County Estimated	120
70	Palo Alto County Estimated	120
72	Union County Estimated	119
73	Humboldt County Estimated	109
74	Lucas County Estimated	108
75	Sac County Estimated	107
76	Montgomery County Estimated	105
77	Monona County Estimated	102
78	Winnebago County Estimated	100
79	Louisa County Estimated	96
79	Van Buren County Estimated	96
81	Shelby County Estimated	94
82	Emmet County Estimated	91
83	Keokuk County Estimated	89
84	Wayne County Estimated	88
85	Decatur County Estimated	85
86	Adair County Estimated	84
86	Guthrie County Estimated	84
88	Greene County Estimated	83
89	Calhoun County Estimated	76
89	Ida County Estimated	76
91	Monroe County Estimated	74
91	Worth County Estimated	74
93	Pocahontas County Estimated	72
94	Osceola County Estimated	66
95	Taylor County Estimated	63
96	Fremont County Estimated	58
97	Audubon County Estimated	53
98	Ringgold County Estimated	49
99	Adams County Estimated	43

Other periods

2025
2024
2023
2022
2021

About this ranking

Estimated live births to resident mothers from July 1 of the previous year through June 30 of the reported year.

Census population estimates component. The year identifies the end of the July-to-June period. These estimates can be revised and differ from calendar-year birth totals.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program: births, July 1 of the previous year to June 30 of the reported year, nation, states and counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Rank Counties in Iowa by births (July to June) using official data, and cite the source.

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Questions

Which county has the highest births (July to June)?

Polk County, with 6,308 in 2021, according to the U.S. Census Bureau.

Which county has the lowest births (July to June)?

Adams County, with 43 in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program: births, July 1 of the previous year to June 30 of the reported year, nation, states and counties. Retrieved 2026-10-08.