Data / Rankings / Median age on 1 July (US county estimates) / Counties in Missouri

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 2015, at 55.6 years. Pulaski County had the lowest, at 26.8 years. The median was 41.3 years. Source: the U.S. Census Bureau.

Highest55.6Hickory County
Lowest26.8Pulaski County
Median41.3115 counties

Top 40 counties, 2015

Hickory County: 55.6 yearsHickory County55.6Benton County: 52.9 yearsBenton County52.9Stone County: 52.6 yearsStone County52.6Camden County: 50.5 yearsCamden County50.5Ozark County: 50.3 yearsOzark County50.3St. Clair County: 49.4 yearsSt. Clair County49.4Douglas County: 47.6 yearsDouglas County47.6Dade County: 47.4 yearsDade County47.4Worth County: 47.3 yearsWorth County47.3Wayne County: 47.1 yearsWayne County47.1Holt County: 47 yearsHolt County47Morgan County: 46.9 yearsMorgan County46.9Oregon County: 46.5 yearsOregon County46.5Putnam County: 46.3 yearsPutnam County46.3Atchison County: 46.2 yearsAtchison County46.2Gasconade County: 46.1 yearsGasconade County46.1Chariton County: 45.9 yearsChariton County45.9Reynolds County: 45.7 yearsReynolds County45.7Shannon County: 45.5 yearsShannon County45.5Iron County: 45.2 yearsIron County45.2Monroe County: 45.2 yearsMonroe County45.2Knox County: 44.9 yearsKnox County44.9Ralls County: 44.6 yearsRalls County44.6Cedar County: 44.5 yearsCedar County44.5Maries County: 44.4 yearsMaries County44.4Montgomery County: 44.4 yearsMontgomery County44.4Dent County: 44.2 yearsDent County44.2Henry County: 44.2 yearsHenry County44.2Bollinger County: 43.9 yearsBollinger County43.9Carroll County: 43.8 yearsCarroll County43.8Dallas County: 43.7 yearsDallas County43.7Ste. Genevieve County: 43.7 yearsSte. Genevieve County43.7Macon County: 43.3 yearsMacon County43.3Mercer County: 43.3 yearsMercer County43.3Barry County: 43.2 yearsBarry County43.2Carter County: 43.1 yearsCarter County43.1Ripley County: 43.1 yearsRipley County43.1Caldwell County: 42.9 yearsCaldwell County42.9Clark County: 42.8 yearsClark County42.8Harrison County: 42.8 yearsHarrison County42.8
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

RankCounties2015
years		Change on 2014
1Hickory County55.6+0.7
2Benton County52.9+0.3
3Stone County52.6+0.5
4Camden County50.5+0.3
5Ozark County50.3+0.1
6St. Clair County49.4-0.3
7Douglas County47.6+0.9
8Dade County47.4+0.2
9Worth County47.3-0.2
10Wayne County47.1+0.1
11Holt County47-0.3
12Morgan County46.9+0.2
13Oregon County46.5+0.1
14Putnam County46.3-0.2
15Atchison County46.2-0.3
16Gasconade County46.1+0.2
17Chariton County45.90
18Reynolds County45.7+0.7
19Shannon County45.5+0.8
20Iron County45.2+0.9
20Monroe County45.2+0.6
22Knox County44.9+1
23Ralls County44.6+0.3
24Cedar County44.5-0.4
25Maries County44.4+0.2
25Montgomery County44.4+0.5
27Dent County44.2+0.4
27Henry County44.2+0.4
29Bollinger County43.9+0.6
30Carroll County43.8+0.4
31Dallas County43.7-0.1
31Ste. Genevieve County43.7+0.1
33Macon County43.3+0.3
33Mercer County43.3-0.2
35Barry County43.20
36Carter County43.1+0.1
36Ripley County43.1+0.6
38Caldwell County42.9-0.2
39Clark County42.80
39Harrison County42.8-0.1
39Linn County42.8-0.3
39Texas County42.8+0.1
43Shelby County42.6-0.8
44Crawford County42.3+0.3
45Bates County42.2+0.2
45Ray County42.2+0.3
47Lafayette County42.10
48Sullivan County41.9+0.3
49Clinton County41.8-0.4
49Stoddard County41.8-0.1
51Wright County41.6-0.2
52Andrew County41.5-0.3
52Livingston County41.5+0.2
52Madison County41.5-0.1
52Miller County41.5-0.1
56Taney County41.40
57Gentry County41.30
57New Madrid County41.3+0.1
59Barton County41.2+0.4
59Washington County41.2+0.5
61Howell County41.1+0.2
62Franklin County40.9+0.2
63DeKalb County40.80
64Daviess County40.70
64Grundy County40.7-0.3
64Perry County40.7+0.4
67Osage County40.6+0.2
68Butler County40.4-0.1
68Laclede County40.4+0.1
68Mississippi County40.4+0.8
68Schuyler County40.4-1.3
68Warren County40.4-0.1
73St. Louis County40.3-0.1
74Lawrence County40.20
75Pike County400
76Vernon County39.9+0.1
77Dunklin County39.8+0.3
77Marion County39.8+0.2
77Newton County39.8+0.2
80Cass County39.5+0.3
80Scott County39.5-0.2
82Cooper County39.40
82Randolph County39.4+0.1
84Lewis County39.1-0.1
84St. Francois County39.10
86Jefferson County39+0.2
87Polk County38.9+0.1
88Audrain County38.6-0.1
88Callaway County38.6+0.2
88Cole County38.60
88Howard County38.6-0.4
92Platte County38.20
93Moniteau County38.1+0.2
94St. Charles County37.9+0.2
95McDonald County37.8+0.2
95Pemiscot County37.8+0.2
95Webster County37.8-0.2
98Buchanan County37.5+0.3
99Scotland County37.40
100Pettis County37.3+0.1
101Christian County37.20
102Saline County37.1+0.1
103Lincoln County37+0.2
104Clay County36.9+0.1
105Cape Girardeau County36.5+0.1
106Jackson County36.40
107Greene County35.9+0.1
108Jasper County35.5+0.1
109Phelps County34.8+0.1
110St. Louis city34.7+0.1
111Nodaway County31.1+0.8
112Johnson County30.6+0.4
113Boone County30.4+0.1
114Adair County29.3+0.6
115Pulaski County26.8+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), 2015) [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), 2015. 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=2015. 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), 2015. 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=2015.

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), 2015 [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=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_by_2015,
  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), 2015}},
  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=2015. 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), 2015
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=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/missouri-counties?period=2015.
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  -
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Questions

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

Hickory County, with 55.6 years in 2015, according to the U.S. Census Bureau.

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

Pulaski County, with 26.8 years in 2015.

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.

Median age on 1 July (US county estimates): other rankings

Counties in Missouri: more rankings