Counties in Iowa by natural change, July to June

Polk County had the highest natural change, July to June of 99 counties in 2014, at 3,662. Monona County had the lowest, at -90. The median was 5 and the figure for Iowa was 10,574. Source: the U.S. Census Bureau.

Highest3,662Polk County

Lowest-90Monona County

Median599 counties

Iowa10,574History

Map of counties, 2014

Under -20
-20 to -10
-10 to 0
0 to 20
20 to 70
70 and over

persons, 2014. Red areas are below zero and blue areas above it. Source: U.S. Census Bureau, Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2014

persons. Source: U.S. Census Bureau, Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2014 persons	Change on 2013
1	Polk County Estimated	3,662	+5.5%
2	Johnson County Estimated	1,117	-0.8%
3	Linn County Estimated	1,069	+4.5%
4	Scott County Estimated	863	+14.8%
5	Dallas County Estimated	773	-9.1%
6	Woodbury County Estimated	638	+10.4%
7	Black Hawk County Estimated	506	-8.5%
8	Story County Estimated	420	-12.1%
9	Dubuque County Estimated	343	+36.7%
10	Pottawattamie County Estimated	275	+3.8%
11	Sioux County Estimated	262	+4%
12	Muscatine County Estimated	168	+19.1%
13	Buena Vista County Estimated	138	-7.4%
14	Warren County Estimated	136	-22.7%
15	Marshall County Estimated	101	+14.8%
16	Crawford County Estimated	85	+70%
17	Lyon County Estimated	76	+100%
18	Buchanan County Estimated	71	+1.4%
19	Benton County Estimated	66	+43.5%
19	Washington County Estimated	66	-18.5%
21	Marion County Estimated	58	+114.8%
22	Bremer County Estimated	57	+96.6%
23	Davis County Estimated	53	+65.6%
24	Mahaska County Estimated	51	+13.3%
25	Plymouth County Estimated	48	+26.3%
26	Delaware County Estimated	41	+70.8%
27	Hamilton County Estimated	34	+409.1%
27	Winnebago County Estimated	34	+187.2%
29	Madison County Estimated	29	+680%
29	Tama County Estimated	29	+680%
31	Louisa County Estimated	27	+22.7%
32	Jasper County Estimated	26	-67.5%
32	Mills County Estimated	26	+1,200%
34	Clayton County Estimated	24	+250%
35	Franklin County Estimated	22	+184.6%
36	Harrison County Estimated	21	+152.5%
37	Allamakee County Estimated	20	-39.4%
38	Carroll County Estimated	16	+500%
39	Keokuk County Estimated	15	+155.6%
40	Iowa County Estimated	14	+380%
40	Wapello County Estimated	14	-26.3%
42	Chickasaw County Estimated	13	+186.7%
42	Wayne County Estimated	13	-38.1%
44	Clinton County Estimated	11	-26.7%
44	Osceola County Estimated	11	0%
46	Henry County Estimated	9	-65.4%
47	Mitchell County Estimated	7	+136.8%
48	Howard County Estimated	6	-14.3%
49	Adams County Estimated	5	n/a
49	Clarke County Estimated	5	-78.3%
51	Cedar County Estimated	3	-62.5%
51	Des Moines County Estimated	3	-66.7%
51	Grundy County Estimated	3	-76.9%
54	Floyd County Estimated	1	+102.4%
55	Emmet County Estimated	0	+100%
56	Worth County Estimated	-1	+95%
57	Ida County Estimated	-2	+50%
58	Jackson County Estimated	-4	+84.6%
59	Pocahontas County Estimated	-5	+87.2%
60	Taylor County Estimated	-7	+41.7%
60	Winneshiek County Estimated	-7	+81.1%
60	Wright County Estimated	-7	+70.8%
63	Clay County Estimated	-8	-125%
63	Jones County Estimated	-8	-180%
65	Page County Estimated	-9	+71%
66	Decatur County Estimated	-10	-66.7%
66	Lucas County Estimated	-10	+33.3%
68	Van Buren County Estimated	-11	-168.8%
68	Webster County Estimated	-11	+54.2%
70	Cerro Gordo County Estimated	-13	+31.6%
70	Fremont County Estimated	-13	+58.1%
70	Ringgold County Estimated	-13	+45.8%
73	Humboldt County Estimated	-14	-133.3%
74	Guthrie County Estimated	-15	-1,400%
75	Appanoose County Estimated	-16	+57.9%
75	O'Brien County Estimated	-16	-128.6%
75	Sac County Estimated	-16	+59%
78	Cherokee County Estimated	-17	+22.7%
79	Audubon County Estimated	-18	-100%
80	Jefferson County Estimated	-19	-46.2%
81	Butler County Estimated	-21	+19.2%
81	Palo Alto County Estimated	-21	+44.7%
83	Greene County Estimated	-22	-46.7%
84	Hardin County Estimated	-23	+42.5%
85	Boone County Estimated	-24	-260%
86	Hancock County Estimated	-25	-4.2%
86	Lee County Estimated	-25	-38.9%
88	Adair County Estimated	-30	+40%
88	Union County Estimated	-30	-276.5%
90	Monroe County Estimated	-35	-94.4%
91	Kossuth County Estimated	-36	+33.3%
92	Montgomery County Estimated	-37	+9.8%
92	Shelby County Estimated	-37	-1,333.3%
94	Calhoun County Estimated	-40	-53.8%
95	Dickinson County Estimated	-54	+20.6%
96	Poweshiek County Estimated	-58	+10.8%
97	Cass County Estimated	-62	-195.2%
98	Fayette County Estimated	-70	-27.3%
99	Monona County Estimated	-90	-30.4%

Other periods

About this ranking

Estimated births minus deaths of residents from July 1 of the previous year through June 30 of the reported year. A negative value means more deaths than births.

Equals births_july_june minus deaths_july_june for the same place and year. Not a calendar-year figure.

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: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021 (Counties in Iowa by natural change, July to June, 2014) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Iowa by natural change, July to June, 2014. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/natural-change-july-june/iowa-counties?period=2014. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Counties in Iowa by natural change, July to June, 2014. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/natural-change-july-june/iowa-counties?period=2014.

Harvard

U.S. Census Bureau (2026) Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Iowa by natural change, July to June, 2014 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/natural-change-july-june/iowa-counties?period=2014 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_iowa_by_2014,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Iowa by natural change, July to June, 2014}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/iowa-counties?period=2014. Publisher attribution: U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Iowa by natural change, July to June, 2014
PY  - 2026
DA  - 2026/03/26
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/natural-change-july-june/iowa-counties?period=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/iowa-counties?period=2014.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest natural change, July to June?

Polk County, with 3,662 in 2014, according to the U.S. Census Bureau.

Which county has the lowest natural change, July to June?

Monona County, with -90 in 2014.

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: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.