Data / Rankings / Population aged 18 to 64 / Counties in Missouri

Counties in Missouri by population aged 18 to 64

St. Louis city had the highest population aged 18 to 64 of 115 counties in 2021, at 67.8%. Hickory County had the lowest, at 48.1%. The median was 56.3% and the figure for Missouri was 59.7%. Source: the U.S. Census Bureau.

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Highest67.8St. Louis city
Lowest48.1Hickory County
Median56.3115 counties
Missouri59.7History

Map of counties, 2021

Adair County: 65 %Andrew County: 56.7 %Atchison County: 53.7 %Audrain County: 56.7 %Barry County: 55.4 %Barton County: 55.3 %Bates County: 56.1 %Benton County: 51.5 %Bollinger County: 55.5 %Boone County: 65.7 %Buchanan County: 59.6 %Butler County: 57.1 %Caldwell County: 55.2 %Callaway County: 61.2 %Camden County: 54 %Cape Girardeau County: 60.7 %Carroll County: 55.2 %Carter County: 54.5 %Cass County: 58.2 %Cedar County: 51.6 %Chariton County: 52.8 %Christian County: 57.3 %Clark County: 53.9 %Clay County: 60.7 %Clinton County: 57.3 %Cole County: 59.8 %Cooper County: 57.6 %Crawford County: 56.3 %Dade County: 53.2 %Dallas County: 55.2 %Daviess County: 53.5 %DeKalb County: 63.7 %Dent County: 55.3 %Douglas County: 51.1 %Dunklin County: 55.7 %Franklin County: 58.5 %Gasconade County: 55 %Gentry County: 52.5 %Greene County: 62.1 %Grundy County: 52.2 %Harrison County: 52.7 %Henry County: 54.9 %Hickory County: 48.1 %Holt County: 52.8 %Howard County: 58.4 %Howell County: 54.8 %Iron County: 55.6 %Jackson County: 61.5 %Jasper County: 59.2 %Jefferson County: 60.5 %Johnson County: 63.7 %Knox County: 52.9 %Laclede County: 56.7 %Lafayette County: 57.2 %Lawrence County: 55.5 %Lewis County: 59 %Lincoln County: 59.8 %Linn County: 54.3 %Livingston County: 57.2 %McDonald County: 58.9 %Macon County: 54.1 %Madison County: 57.5 %Maries County: 57.1 %Marion County: 57.4 %Mercer County: 54.1 %Miller County: 56.3 %Mississippi County: 58.6 %Moniteau County: 56.6 %Monroe County: 53.5 %Montgomery County: 56.2 %Morgan County: 53 %New Madrid County: 55.5 %Newton County: 57 %Nodaway County: 62.6 %Oregon County: 52.1 %Osage County: 58.5 %Ozark County: 53.2 %Pemiscot County: 55.9 %Perry County: 56.9 %Pettis County: 57.3 %Phelps County: 62.3 %Pike County: 57.6 %Platte County: 60.9 %Polk County: 57 %Pulaski County: 67.8 %Putnam County: 52.2 %Ralls County: 56.2 %Randolph County: 60.4 %Ray County: 57.8 %Reynolds County: 55 %Ripley County: 53.3 %St. Charles County: 60.4 %St. Clair County: 52.4 %Ste. Genevieve County: 58 %St. Francois County: 61.3 %St. Louis County: 58.6 %Saline County: 60.2 %Schuyler County: 51 %Scotland County: 51.2 %Scott County: 56.8 %Shannon County: 53.5 %Shelby County: 52.8 %Stoddard County: 56.6 %Stone County: 51.7 %Sullivan County: 55.8 %Taney County: 57.2 %Texas County: 56.3 %Vernon County: 55.7 %Warren County: 58.9 %Washington County: 59.4 %Wayne County: 54.1 %Webster County: 56.2 %Worth County: 54.8 %Wright County: 54.1 %St. Louis city: 67.8 %
  • Under 53
  • 53 to 55
  • 55 to 56
  • 56 to 57
  • 57 to 60
  • 60 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

St. Louis city: 67.8 %St. Louis city67.8Pulaski County: 67.8 %Pulaski County67.8Boone County: 65.7 %Boone County65.7Adair County: 65 %Adair County65Johnson County: 63.7 %Johnson County63.7DeKalb County: 63.7 %DeKalb County63.7Nodaway County: 62.6 %Nodaway County62.6Phelps County: 62.3 %Phelps County62.3Greene County: 62.1 %Greene County62.1Jackson County: 61.5 %Jackson County61.5St. Francois County: 61.3 %St. Francois County61.3Callaway County: 61.2 %Callaway County61.2Platte County: 60.9 %Platte County60.9Cape Girardeau County: 60.7 %Cape Girardeau County60.7Clay County: 60.7 %Clay County60.7Jefferson County: 60.5 %Jefferson County60.5St. Charles County: 60.4 %St. Charles County60.4Randolph County: 60.4 %Randolph County60.4Saline County: 60.2 %Saline County60.2Cole County: 59.8 %Cole County59.8Lincoln County: 59.8 %Lincoln County59.8Buchanan County: 59.6 %Buchanan County59.6Washington County: 59.4 %Washington County59.4Jasper County: 59.2 %Jasper County59.2Lewis County: 59 %Lewis County59Warren County: 58.9 %Warren County58.9McDonald County: 58.9 %McDonald County58.9Mississippi County: 58.6 %Mississippi County58.6St. Louis County: 58.6 %St. Louis County58.6Franklin County: 58.5 %Franklin County58.5Osage County: 58.5 %Osage County58.5Howard County: 58.4 %Howard County58.4Cass County: 58.2 %Cass County58.2Ste. Genevieve County: 58 %Ste. Genevieve County58Ray County: 57.8 %Ray County57.8Cooper County: 57.6 %Cooper County57.6Pike County: 57.6 %Pike County57.6Madison County: 57.5 %Madison County57.5Marion County: 57.4 %Marion County57.4Pettis County: 57.3 %Pettis County57.3St. Louis city: 67.8 %St. Louis city67.8Pulaski County: 67.8 %Pulaski County67.8Boone County: 65.7 %Boone County65.7Adair County: 65 %Adair County65Johnson County: 63.7 %Johnson County63.7DeKalb County: 63.7 %DeKalb County63.7Nodaway County: 62.6 %Nodaway County62.6Phelps County: 62.3 %Phelps County62.3Greene County: 62.1 %Greene County62.1Jackson County: 61.5 %Jackson County61.5St. Francois County: 61.3 %St. Francois County61.3Callaway County: 61.2 %Callaway County61.2Platte County: 60.9 %Platte County60.9Cape Girardeau County: 60.7 %Cape Girardeau County60.7Clay County: 60.7 %Clay County60.7Jefferson County: 60.5 %Jefferson County60.5St. Charles County: 60.4 %St. Charles County60.4Randolph County: 60.4 %Randolph County60.4Saline County: 60.2 %Saline County60.2Cole County: 59.8 %Cole County59.8Lincoln County: 59.8 %Lincoln County59.8Buchanan County: 59.6 %Buchanan County59.6Washington County: 59.4 %Washington County59.4Jasper County: 59.2 %Jasper County59.2Lewis County: 59 %Lewis County59Warren County: 58.9 %Warren County58.9McDonald County: 58.9 %McDonald County58.9Mississippi County: 58.6 %Mississippi County58.6St. Louis County: 58.6 %St. Louis County58.6Franklin County: 58.5 %Franklin County58.5Osage County: 58.5 %Osage County58.5Howard County: 58.4 %Howard County58.4Cass County: 58.2 %Cass County58.2Ste. Genevieve County: 58 %Ste. Genevieve County58Ray County: 57.8 %Ray County57.8Cooper County: 57.6 %Cooper County57.6Pike County: 57.6 %Pike County57.6Madison County: 57.5 %Madison County57.5Marion County: 57.4 %Marion County57.4Pettis County: 57.3 %Pettis County57.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1St. Louis city67.8-0.3 pts
2Pulaski County67.8-0.4 pts
3Boone County65.7-0.1 pts
4Adair County65-0.1 pts
5Johnson County63.7-0.1 pts
6DeKalb County63.7-0.2 pts
7Nodaway County62.6-0.3 pts
8Phelps County62.30 pts
9Greene County62.1-0.1 pts
10Jackson County61.5-0.2 pts
11St. Francois County61.3-0 pts
12Callaway County61.2-0.2 pts
13Platte County60.9-0.1 pts
14Cape Girardeau County60.7-0 pts
15Clay County60.7-0.1 pts
16Jefferson County60.5-0.2 pts
17St. Charles County60.4-0.1 pts
18Randolph County60.4-0.1 pts
19Saline County60.2-0.1 pts
20Cole County59.8-0.1 pts
21Lincoln County59.8-0.3 pts
22Buchanan County59.6-0.3 pts
23Washington County59.4-0.2 pts
24Jasper County59.20 pts
25Lewis County59-0.5 pts
26Warren County58.90 pts
27McDonald County58.9-0.1 pts
28Mississippi County58.6+0.2 pts
29St. Louis County58.6-0.3 pts
30Franklin County58.5-0.2 pts
31Osage County58.5-0.2 pts
32Howard County58.4-0.4 pts
33Cass County58.2-0.1 pts
34Ste. Genevieve County58-0.3 pts
35Ray County57.8-0.2 pts
36Cooper County57.6-0.1 pts
37Pike County57.6-0.1 pts
38Madison County57.5+0.1 pts
39Marion County57.4-0.3 pts
40Pettis County57.3-0.3 pts
41Christian County57.3-0.2 pts
42Clinton County57.3+0.3 pts
43Livingston County57.2-0.3 pts
44Lafayette County57.2-0.3 pts
45Taney County57.2-0.2 pts
46Butler County57.1-0.5 pts
47Maries County57.1-0.1 pts
48Newton County57-0.1 pts
49Polk County570 pts
50Perry County56.9-0.2 pts
51Scott County56.8-0.3 pts
52Laclede County56.7-0.3 pts
53Audrain County56.7+0.2 pts
54Andrew County56.7-0.1 pts
55Stoddard County56.6-0.3 pts
56Moniteau County56.60 pts
57Texas County56.3-0.1 pts
58Miller County56.3-0.4 pts
59Crawford County56.3-0.2 pts
60Montgomery County56.2+0.1 pts
61Ralls County56.2-0.4 pts
62Webster County56.2-0.2 pts
63Bates County56.1-0.2 pts
64Pemiscot County55.9-0.4 pts
65Sullivan County55.8-0.6 pts
66Dunklin County55.7-0.2 pts
67Vernon County55.7-0.2 pts
68Iron County55.6-0.4 pts
69Lawrence County55.5-0 pts
70Bollinger County55.5-0.2 pts
71New Madrid County55.5-0.6 pts
72Barry County55.4-0.3 pts
73Dent County55.3-0.2 pts
74Barton County55.3-0.5 pts
75Carroll County55.20 pts
76Dallas County55.2-0 pts
77Caldwell County55.2-0.2 pts
78Reynolds County55+0.4 pts
79Gasconade County55-0.3 pts
80Henry County54.90 pts
81Howell County54.8-0.1 pts
82Worth County54.8-0.3 pts
83Carter County54.5-0.5 pts
84Linn County54.3-0.3 pts
85Macon County54.1-0.1 pts
86Mercer County54.1-0.4 pts
87Wayne County54.1+0.2 pts
88Wright County54.1-0.1 pts
89Camden County54+0.1 pts
90Clark County53.9-0.1 pts
91Atchison County53.7-0.2 pts
92Daviess County53.5-0.5 pts
93Monroe County53.5-0.2 pts
94Shannon County53.5-0.6 pts
95Ripley County53.3-0.4 pts
96Dade County53.2-0.2 pts
97Ozark County53.20 pts
98Morgan County53+0.1 pts
99Knox County52.9+0.2 pts
100Holt County52.8+0.2 pts
101Chariton County52.8-0.4 pts
102Shelby County52.8-0.2 pts
103Harrison County52.7-0.4 pts
104Gentry County52.5-0.5 pts
105St. Clair County52.4-0.3 pts
106Putnam County52.2-0.1 pts
107Grundy County52.2-0.2 pts
108Oregon County52.1-0.5 pts
109Stone County51.7-0.3 pts
110Cedar County51.6+0.1 pts
111Benton County51.5+0.3 pts
112Scotland County51.20 pts
113Douglas County51.1-0.5 pts
114Schuyler County51-0.9 pts
115Hickory County48.1-0.4 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. 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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in Missouri by population aged 18 to 64, 2021) [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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Missouri by population aged 18 to 64, 2021. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/missouri-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in Missouri by population aged 18 to 64, 2021. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/missouri-counties?period=2021.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Missouri by population aged 18 to 64, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/missouri-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Missouri by population aged 18 to 64, 2021}},
  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/population-18-64/missouri-counties?period=2021. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. 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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Missouri by population aged 18 to 64, 2021
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/population-18-64/missouri-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/missouri-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. 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 population aged 18 to 64?

St. Louis city, with 67.8% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Hickory County, with 48.1% 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, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in Missouri: more rankings