Counties in Missouri by median age on 1 July (US county estimates)

Hickory County had the highest median age on 1 July (US county estimates) of 115 counties in 2020, at 56.8 years. Pulaski County had the lowest, at 27.4 years. The median was 41.6 years. Source: the U.S. Census Bureau.

Highest56.8Hickory County

Lowest27.4Pulaski County

Median41.6115 counties

Top 40 counties, 2020

years. Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2020 years	Change on 2019
1	Hickory County	56.8	+0.2
2	Stone County	53.9	-0.1
3	Benton County	53.7	+0.2
4	Ozark County	52	+0.3
5	Camden County	51.7	+0.4
6	Worth County	49.3	+2.3
7	Wayne County	49	-0.2
8	Holt County	48.4	+0.5
9	St. Clair County	48.2	-0.7
10	Dade County	47.2	-0.3
11	Shannon County	47.1	-0.8
12	Douglas County	47	-0.7
13	Atchison County	46.9	+0.5
14	Gasconade County	46.8	+0.6
14	Reynolds County	46.8	+0.4
16	Oregon County	46.7	-1.2
17	Chariton County	46.5	+0.6
18	Morgan County	46.4	+0.4
19	Putnam County	46.1	-0.3
20	Ralls County	45.8	+0.8
21	Iron County	45.7	+0.2
21	Monroe County	45.7	-0.4
23	Maries County	45.4	-0.2
24	Carter County	45.2	-0.9
25	Bollinger County	44.9	-0.5
25	Carroll County	44.9	+0.6
25	Montgomery County	44.9	+0.3
28	Dent County	44.7	-0.2
29	Henry County	44.6	-0.2
30	Knox County	44	-0.7
31	Ste. Genevieve County	43.8	0
32	Caldwell County	43.6	+0.2
32	Clark County	43.6	+0.3
32	Ripley County	43.6	-1
35	Cedar County	43.5	-0.1
36	Macon County	43.4	-0.3
36	Texas County	43.4	+0.3
38	Harrison County	43.3	+0.2
39	Barry County	43.2	+0.1
39	Crawford County	43.2	-0.2
39	Linn County	43.2	+0.2
42	Mercer County	43.1	0
43	Mississippi County	42.8	+0.6
44	New Madrid County	42.7	+0.3
45	Dallas County	42.6	-0.5
45	Shelby County	42.6	+0.3
47	Bates County	42.3	0
47	Clinton County	42.3	0
47	Ray County	42.3	+0.1
50	DeKalb County	42.2	-0.1
50	Madison County	42.2	+0.3
50	Stoddard County	42.2	-0.1
50	Taney County	42.2	+0.1
54	Washington County	42.1	0
55	Perry County	42	+0.1
56	Franklin County	41.7	+0.1
56	Sullivan County	41.7	-1.2
58	Andrew County	41.6	+0.5
59	Lafayette County	41.5	-0.4
60	Barton County	41.3	0
60	Livingston County	41.3	+0.2
60	Osage County	41.3	+0.2
63	Cooper County	41.2	+1.2
63	Howell County	41.2	-0.4
63	Miller County	41.2	-0.3
66	Pike County	40.9	+0.3
67	Daviess County	40.8	-0.1
68	Dunklin County	40.7	-0.2
68	Schuyler County	40.7	+0.5
70	Laclede County	40.6	-0.1
70	Randolph County	40.6	+0.5
70	Warren County	40.6	-0.3
73	Butler County	40.5	+0.2
73	St. Louis County	40.5	0
73	Wright County	40.5	-0.2
76	Gentry County	40.4	+0.3
76	St. Francois County	40.4	+0.4
78	Jefferson County	40.3	+0.2
78	Newton County	40.3	-0.2
80	Cass County	40.2	+0.1
80	Vernon County	40.2	+0.3
82	Grundy County	40.1	-0.5
82	Marion County	40.1	+0.2
84	Audrain County	40	+0.3
84	Scott County	40	-0.1
86	Cole County	39.8	+0.1
86	Lawrence County	39.8	-0.2
88	Lewis County	39.5	+0.1
89	Callaway County	39.4	0
89	St. Charles County	39.4	+0.3
91	Buchanan County	39	+0.1
91	Pemiscot County	39	-0.3
91	Polk County	39	-0.3
94	Howard County	38.8	+0.3
95	Moniteau County	38.7	+0.2
96	Platte County	38.4	+0.2
97	Christian County	38.3	+0.3
98	Pettis County	37.9	-0.1
99	McDonald County	37.7	-0.1
100	Clay County	37.4	+0.2
100	Webster County	37.4	-0.1
102	Cape Girardeau County	37.3	0
102	Lincoln County	37.3	+0.1
104	Saline County	37	+0.1
105	Greene County	36.9	+0.2
106	Jackson County	36.8	+0.1
107	Scotland County	36.4	+0.5
108	Jasper County	36.2	+0.2
109	Phelps County	35.4	-0.4
109	St. Louis city	35.4	0
111	Nodaway County	32.6	-0.7
112	Boone County	31.9	+0.3
112	Johnson County	31.9	-0.1
114	Adair County	29.5	-1
115	Pulaski County	27.4	+0.1

Other periods

About this ranking

Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.

Counties only: the county file has no state or national medians, and medians cannot be added up. A single-year estimate, unlike median_age, which for US places is a five-year American Community Survey estimate.

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, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. 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, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (Counties in Missouri by median age on 1 July (US county estimates), 2020) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Counties in Missouri by median age on 1 July (US county estimates), 2020. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/missouri-counties?period=2020. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Counties in Missouri by median age on 1 July (US county estimates), 2020. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/missouri-counties?period=2020.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Counties in Missouri by median age on 1 July (US county estimates), 2020 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/median-age-july-1-us-counties/missouri-counties?period=2020 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_missouri_by_2020,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Counties in Missouri by median age on 1 July (US county estimates), 2020}},
  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/median-age-july-1-us-counties/missouri-counties?period=2020. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. 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, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Counties in Missouri by median age on 1 July (US county estimates), 2020
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/median-age-july-1-us-counties/missouri-counties?period=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/missouri-counties?period=2020.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -

Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Embed code

<iframe src="https://invokely.ai/embed/rankings/median-age-july-1-us-counties/missouri-counties?period=2020" width="760" height="500" title="Counties in Missouri by median age on 1 July (US county estimates), 2020, chart from Invokely" loading="lazy" style="border:0;width:100%;max-width:760px" referrerpolicy="strict-origin-when-cross-origin"></iframe>

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Missouri by median age on 1 July (US county estimates) using official data, and cite the source.

rank_places {"indicator":"median_age_pep","level":"province","within":"Missouri","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=median_age_pep&level=province&within=Missouri&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest median age on 1 July (US county estimates)?

Hickory County, with 56.8 years in 2020, according to the U.S. Census Bureau.

Which county has the lowest median age on 1 July (US county estimates)?

Pulaski County, with 27.4 years in 2020.

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, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12.