Counties in Iowa by births (July to June), 2025

Name: Counties in Iowa by births (July to June), 2025
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 2025, at 6,423. Adams County had the lowest, at 34. The median was 166 and the figure for Iowa was 36,470. Source: the U.S. Census Bureau.

Highest6,423Polk County

Lowest34Adams County

Median16699 counties

Iowa36,470History

Top 40 counties, 2025

CSV Chart (SVG)

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

Full ranking

Rank	Counties	2025 count	Change on 2024
1	Polk County Estimated	6,423	+1.2%
2	Linn County Estimated	2,641	+3.4%
3	Scott County Estimated	1,880	+0.8%
4	Johnson County Estimated	1,719	+1.5%
5	Black Hawk County Estimated	1,610	+2.6%
6	Woodbury County Estimated	1,401	+0.2%
7	Dallas County Estimated	1,399	+1.1%
8	Dubuque County Estimated	1,132	+1.4%
9	Pottawattamie County Estimated	839	-7.7%
10	Story County Estimated	805	-0.5%
11	Warren County Estimated	627	+1%
12	Clinton County Estimated	502	+0.8%
13	Marshall County Estimated	493	+1.4%
14	Wapello County Estimated	475	+1.9%
15	Sioux County Estimated	460	-4.8%
16	Muscatine County Estimated	458	+0.7%
16	Webster County Estimated	458	+2%
18	Jasper County Estimated	439	+0.9%
19	Cerro Gordo County Estimated	398	+0.3%
20	Des Moines County Estimated	388	-0.3%
21	Lee County Estimated	361	+0.3%
22	Marion County Estimated	341	+0.3%
23	Washington County Estimated	299	+1.4%
24	Benton County Estimated	289	+2.1%
25	Plymouth County Estimated	287	+0.7%
26	Buchanan County Estimated	285	-0.3%
27	Buena Vista County Estimated	276	+3%
28	Bremer County Estimated	262	+0.8%
29	Boone County Estimated	253	+0.8%
30	Mahaska County Estimated	237	+0.9%
31	Fayette County Estimated	224	+3.7%
32	Carroll County Estimated	222	0%
33	Jones County Estimated	210	+4%
33	Tama County Estimated	210	+1%
35	Hamilton County Estimated	207	+1%
36	Crawford County Estimated	204	0%
37	Wright County Estimated	200	+1.5%
38	Delaware County Estimated	199	-2%
38	Jackson County Estimated	199	-0.5%
40	Iowa County Estimated	191	+1.1%
41	Kossuth County Estimated	185	+1.1%
42	Cedar County Estimated	181	+0.6%
43	O'Brien County Estimated	178	-1.1%
44	Henry County Estimated	176	-1.1%
45	Winneshiek County Estimated	175	0%
46	Floyd County Estimated	173	-1.1%
47	Hardin County Estimated	171	+1.2%
48	Davis County Estimated	170	-1.2%
49	Poweshiek County Estimated	167	+1.8%
50	Clayton County Estimated	166	-6.2%
51	Madison County Estimated	157	-2.5%
52	Allamakee County Estimated	156	-2.5%
53	Clay County Estimated	153	0%
54	Dickinson County Estimated	149	-2%
55	Harrison County Estimated	143	-6.5%
56	Butler County Estimated	141	+0.7%
56	Grundy County Estimated	141	+1.4%
58	Chickasaw County Estimated	140	-0.7%
59	Lyon County Estimated	133	-9.5%
60	Clarke County Estimated	132	0%
61	Jefferson County Estimated	131	+0.8%
62	Cass County Estimated	129	-2.3%
63	Appanoose County Estimated	127	+0.8%
63	Cherokee County Estimated	127	+2.4%
65	Mills County Estimated	125	-8.1%
66	Union County Estimated	123	-1.6%
67	Howard County Estimated	121	+2.5%
67	Palo Alto County Estimated	121	-1.6%
69	Franklin County Estimated	119	+2.6%
70	Sac County Estimated	118	-1.7%
71	Page County Estimated	115	-4.2%
72	Shelby County Estimated	113	-1.7%
73	Wayne County Estimated	112	0%
74	Lucas County Estimated	110	+3.8%
75	Mitchell County Estimated	108	-4.4%
76	Hancock County Estimated	107	0%
77	Emmet County Estimated	105	-1.9%
78	Humboldt County Estimated	101	+4.1%
79	Keokuk County Estimated	100	-1%
80	Louisa County Estimated	99	+1%
80	Montgomery County Estimated	99	-7.5%
82	Decatur County Estimated	98	+3.2%
83	Guthrie County Estimated	96	+1.1%
84	Monona County Estimated	93	-1.1%
85	Winnebago County Estimated	91	-2.2%
86	Calhoun County Estimated	89	-1.1%
87	Greene County Estimated	88	0%
87	Van Buren County Estimated	88	-3.3%
89	Adair County Estimated	85	+1.2%
90	Monroe County Estimated	83	-3.5%
90	Worth County Estimated	83	-2.4%
92	Pocahontas County Estimated	73	0%
93	Ida County Estimated	71	+1.4%
94	Taylor County Estimated	67	0%
95	Audubon County Estimated	66	0%
96	Osceola County Estimated	62	-1.6%
97	Fremont County Estimated	59	-7.8%
98	Ringgold County Estimated	44	0%
99	Adams County Estimated	34	-2.9%

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 6,423 in 2025, according to the U.S. Census Bureau.

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

Adams County, with 34 in 2025.

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.