Data / Rankings / High school graduate or higher, population 25 and over / Counties in Missouri

Counties in Missouri by high school graduate or higher, population 25 and over

Platte County had the highest high school graduate or higher, population 25 and over of 115 counties in 2021, at 96.6%. Reynolds County had the lowest, at 77.8%. The median was 88.2% and the figure for Missouri was 91%. Source: the U.S. Census Bureau.

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Highest96.6Platte County
Lowest77.8Reynolds County
Median88.2115 counties
Missouri91History

Map of counties, 2021

Adair County: 91.9 %Andrew County: 93.5 %Atchison County: 90 %Audrain County: 87.3 %Barry County: 85.1 %Barton County: 87.7 %Bates County: 88.1 %Benton County: 87 %Bollinger County: 84.9 %Boone County: 95 %Buchanan County: 89.5 %Butler County: 84.2 %Caldwell County: 89.2 %Callaway County: 89.2 %Camden County: 91.4 %Cape Girardeau County: 91.9 %Carroll County: 90.4 %Carter County: 87 %Cass County: 93.3 %Cedar County: 86.2 %Chariton County: 91.4 %Christian County: 92.5 %Clark County: 86.4 %Clay County: 93.6 %Clinton County: 93.4 %Cole County: 92.6 %Cooper County: 89.3 %Crawford County: 81.1 %Dade County: 89.2 %Dallas County: 86.8 %Daviess County: 87.2 %DeKalb County: 89.6 %Dent County: 83.9 %Douglas County: 83.8 %Dunklin County: 79.2 %Franklin County: 90 %Gasconade County: 88.4 %Gentry County: 86 %Greene County: 92.9 %Grundy County: 84.5 %Harrison County: 91.4 %Henry County: 88.6 %Hickory County: 89.1 %Holt County: 94.2 %Howard County: 87.9 %Howell County: 85.9 %Iron County: 82.7 %Jackson County: 91.4 %Jasper County: 87.6 %Jefferson County: 90.7 %Johnson County: 93 %Knox County: 86.7 %Laclede County: 86.5 %Lafayette County: 90.4 %Lawrence County: 85 %Lewis County: 85.4 %Lincoln County: 90.9 %Linn County: 89.9 %Livingston County: 88.2 %McDonald County: 78.2 %Macon County: 90.3 %Madison County: 87.5 %Maries County: 85.9 %Marion County: 89.6 %Mercer County: 87.5 %Miller County: 89 %Mississippi County: 79.8 %Moniteau County: 85.6 %Monroe County: 90.9 %Montgomery County: 85.8 %Morgan County: 79.1 %New Madrid County: 82.3 %Newton County: 89.2 %Nodaway County: 94 %Oregon County: 83.4 %Osage County: 91.9 %Ozark County: 81.6 %Pemiscot County: 79.8 %Perry County: 86.2 %Pettis County: 87.4 %Phelps County: 90.6 %Pike County: 87.1 %Platte County: 96.6 %Polk County: 89.2 %Pulaski County: 94.4 %Putnam County: 94.4 %Ralls County: 90.5 %Randolph County: 89 %Ray County: 89.4 %Reynolds County: 77.8 %Ripley County: 81.8 %St. Charles County: 95.4 %St. Clair County: 88.1 %Ste. Genevieve County: 91.4 %St. Francois County: 86 %St. Louis County: 94.1 %Saline County: 87.1 %Schuyler County: 89.7 %Scotland County: 79.4 %Scott County: 85.6 %Shannon County: 85.8 %Shelby County: 88.7 %Stoddard County: 81.1 %Stone County: 90.1 %Sullivan County: 85.1 %Taney County: 90.1 %Texas County: 85.1 %Vernon County: 89.3 %Warren County: 88 %Washington County: 80.5 %Wayne County: 81.8 %Webster County: 87.3 %Worth County: 91.4 %Wright County: 83 %St. Louis city: 89.3 %
  • Under 84
  • 84 to 87
  • 87 to 88
  • 88 to 90
  • 90 to 91
  • 91 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

Platte County: 96.6 %Platte County96.6St. Charles County: 95.4 %St. Charles County95.4Boone County: 95 %Boone County95Pulaski County: 94.4 %Pulaski County94.4Putnam County: 94.4 %Putnam County94.4Holt County: 94.2 %Holt County94.2St. Louis County: 94.1 %St. Louis County94.1Nodaway County: 94 %Nodaway County94Clay County: 93.6 %Clay County93.6Andrew County: 93.5 %Andrew County93.5Clinton County: 93.4 %Clinton County93.4Cass County: 93.3 %Cass County93.3Johnson County: 93 %Johnson County93Greene County: 92.9 %Greene County92.9Cole County: 92.6 %Cole County92.6Christian County: 92.5 %Christian County92.5Adair County: 91.9 %Adair County91.9Cape Girardeau County: 91.9 %Cape Girardeau County91.9Osage County: 91.9 %Osage County91.9Ste. Genevieve County: 91.4 %Ste. Genevieve County91.4Worth County: 91.4 %Worth County91.4Camden County: 91.4 %Camden County91.4Jackson County: 91.4 %Jackson County91.4Harrison County: 91.4 %Harrison County91.4Chariton County: 91.4 %Chariton County91.4Monroe County: 90.9 %Monroe County90.9Lincoln County: 90.9 %Lincoln County90.9Jefferson County: 90.7 %Jefferson County90.7Phelps County: 90.6 %Phelps County90.6Ralls County: 90.5 %Ralls County90.5Lafayette County: 90.4 %Lafayette County90.4Carroll County: 90.4 %Carroll County90.4Macon County: 90.3 %Macon County90.3Taney County: 90.1 %Taney County90.1Stone County: 90.1 %Stone County90.1Atchison County: 90 %Atchison County90Franklin County: 90 %Franklin County90Linn County: 89.9 %Linn County89.9Schuyler County: 89.7 %Schuyler County89.7Marion County: 89.6 %Marion County89.6Platte County: 96.6 %Platte County96.6St. Charles County: 95.4 %St. Charles County95.4Boone County: 95 %Boone County95Pulaski County: 94.4 %Pulaski County94.4Putnam County: 94.4 %Putnam County94.4Holt County: 94.2 %Holt County94.2St. Louis County: 94.1 %St. Louis County94.1Nodaway County: 94 %Nodaway County94Clay County: 93.6 %Clay County93.6Andrew County: 93.5 %Andrew County93.5Clinton County: 93.4 %Clinton County93.4Cass County: 93.3 %Cass County93.3Johnson County: 93 %Johnson County93Greene County: 92.9 %Greene County92.9Cole County: 92.6 %Cole County92.6Christian County: 92.5 %Christian County92.5Adair County: 91.9 %Adair County91.9Cape Girardeau County: 91.9 %Cape Girardeau County91.9Osage County: 91.9 %Osage County91.9Ste. Genevieve County: 91.4 %Ste. Genevieve County91.4Worth County: 91.4 %Worth County91.4Camden County: 91.4 %Camden County91.4Jackson County: 91.4 %Jackson County91.4Harrison County: 91.4 %Harrison County91.4Chariton County: 91.4 %Chariton County91.4Monroe County: 90.9 %Monroe County90.9Lincoln County: 90.9 %Lincoln County90.9Jefferson County: 90.7 %Jefferson County90.7Phelps County: 90.6 %Phelps County90.6Ralls County: 90.5 %Ralls County90.5Lafayette County: 90.4 %Lafayette County90.4Carroll County: 90.4 %Carroll County90.4Macon County: 90.3 %Macon County90.3Taney County: 90.1 %Taney County90.1Stone County: 90.1 %Stone County90.1Atchison County: 90 %Atchison County90Franklin County: 90 %Franklin County90Linn County: 89.9 %Linn County89.9Schuyler County: 89.7 %Schuyler County89.7Marion County: 89.6 %Marion County89.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Platte County96.6
2St. Charles County95.4
3Boone County95
4Pulaski County94.4
5Putnam County94.4
6Holt County94.2
7St. Louis County94.1
8Nodaway County94
9Clay County93.6
10Andrew County93.5
11Clinton County93.4
12Cass County93.3
13Johnson County93
14Greene County92.9
15Cole County92.6
16Christian County92.5
17Adair County91.9
18Cape Girardeau County91.9
19Osage County91.9
20Ste. Genevieve County91.4
21Worth County91.4
22Camden County91.4
22Jackson County91.4
24Harrison County91.4
25Chariton County91.4
26Monroe County90.9
27Lincoln County90.9
28Jefferson County90.7
29Phelps County90.6
30Ralls County90.5
31Lafayette County90.4
32Carroll County90.4
33Macon County90.3
34Taney County90.1
35Stone County90.1
36Atchison County90
37Franklin County90
38Linn County89.9
39Schuyler County89.7
40Marion County89.6
41DeKalb County89.6
42Buchanan County89.5
43Ray County89.4
44Vernon County89.3
45Cooper County89.3
46St. Louis city89.3
47Newton County89.2
47Polk County89.2
49Caldwell County89.2
49Dade County89.2
51Callaway County89.2
52Hickory County89.1
53Miller County89
54Randolph County89
55Shelby County88.7
56Henry County88.6
57Gasconade County88.4
58Livingston County88.2
59St. Clair County88.1
60Bates County88.1
61Warren County88
62Howard County87.9
63Barton County87.7
64Jasper County87.6
65Madison County87.5
66Mercer County87.5
67Pettis County87.4
68Webster County87.3
69Audrain County87.3
70Daviess County87.2
71Saline County87.1
72Pike County87.1
73Carter County87
74Benton County87
75Dallas County86.8
76Knox County86.7
77Laclede County86.5
78Clark County86.4
79Perry County86.2
80Cedar County86.2
81Gentry County86
82St. Francois County86
83Maries County85.9
84Howell County85.9
85Montgomery County85.8
86Shannon County85.8
87Moniteau County85.6
87Scott County85.6
89Lewis County85.4
90Texas County85.1
91Barry County85.1
92Sullivan County85.1
93Lawrence County85
94Bollinger County84.9
95Grundy County84.5
96Butler County84.2
97Dent County83.9
98Douglas County83.8
99Oregon County83.4
100Wright County83
101Iron County82.7
102New Madrid County82.3
103Ripley County81.8
103Wayne County81.8
105Ozark County81.6
106Crawford County81.1
107Stoddard County81.1
108Washington County80.5
109Mississippi County79.8
110Pemiscot County79.8
111Scotland County79.4
112Dunklin County79.2
113Morgan County79.1
114McDonald County78.2
115Reynolds County77.8

Other periods

About this ranking

People aged 25 and over who hold a regular high school diploma, a GED or alternative credential, or any higher level of education, as a percentage of all people aged 25 and over. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Measures the adult population, not students: it is not the high school graduation rate of a class. Not comparable with the EU share below upper secondary education, which covers ages 25 to 64.

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. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. 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). American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs (Counties in Missouri by high school graduate or higher, population 25 and over, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat

MLA 9

American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Missouri by high school graduate or higher, population 25 and over, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/missouri-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. Counties in Missouri by high school graduate or higher, population 25 and over, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Also distributed by Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/missouri-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Missouri by high school graduate or higher, population 25 and over, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat, via Invokely: https://invokely.ai/rankings/high-school-graduate-or-higher/missouri-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_missouri_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Missouri by high school graduate or higher, population 25 and over, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/missouri-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Missouri by high school graduate or higher, population 25 and over, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat
L2  - https://invokely.ai/rankings/high-school-graduate-or-higher/missouri-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/missouri-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Missouri by high school graduate or higher, population 25 and over using official data, and cite the source.
rank_places {"indicator":"high_school_graduate_share","level":"province","within":"Missouri","limit":10}
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Questions

Which county has the highest high school graduate or higher, population 25 and over?

Platte County, with 96.6% in 2021, according to the U.S. Census Bureau.

Which county has the lowest high school graduate or higher, population 25 and over?

Reynolds County, with 77.8% 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, American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. Retrieved 2026-10-12.

High school graduate or higher, population 25 and over: other rankings

Counties in Missouri: more rankings