Clinton County, Missouri

Clinton County is county located in the U.S. state of Missouri and is part of the Kansas City metropolitan area. As of the 2020 U.S. Census, the county had a population of 21,184. Its county seat is Plattsburg. The county was organized January 2, 1833, and named for Governor DeWitt Clinton of New York. The county seat of Plattsburg derives its name from a town of a similar name that is the county seat of Clinton County, New York, which was also named for the Governor.

Geography

According to the U.S. Census Bureau, the county has a total area of , of which is land and (1.1%) is water.

Adjacent counties

DeKalb County (north)
Caldwell County (east)
Ray County (southeast)
Clay County (south)
Platte County (southwest)
Buchanan County (west)

Major highways

Demographics

2020 census

As of the 2020 census, the county had a population of 21,184. The median age was 42.4 years. 23.4% of residents were under the age of 18 and 19.7% of residents were 65 years of age or older. For every 100 females there were 99.8 males, and for every 100 females age 18 and over there were 98.9 males.

The racial makeup of the county was 91.7% White, 1.0% Black or African American, 0.4% American Indian and Alaska Native, 0.4% Asian, 0.0% Native Hawaiian and Pacific Islander, 0.6% from some other race, and 5.9% from two or more races. Hispanic or Latino residents of any race comprised 2.4% of the population.

24.2% of residents lived in urban areas, while 75.8% lived in rural areas.

There were 8,173 households in the county, of which 31.4% had children under the age of 18 living with them and 20.8% had a female householder with no spouse or partner present. About 24.5% of all households were made up of individuals and 11.6% had someone living alone who was 65 years of age or older.

!Pop 1990

!Pop 2000

!Pop 2010

!style="background-color: #ffffb3;" | Pop 2020

!% 1980

!% 1990

!% 2000

!% 2010

!style="background-color: #ffffb3;" |% 2020

|White alone (NH)

|15,400

|16,033

|18,191

|19,606

|style='background: #ffffe6; |19,264

|96.76%

|96.61%

|95.85%

|94.52%

|style='background: #ffffe6; |90.94%

|Black or African American alone (NH)

|336

|326

|284

|style='background: #ffffe6; |202

|2.11%

|1.96%

|1.50%

|1.37%

|style='background: #ffffe6; |0.95%

|Native American or Alaska Native alone (NH)

|48

|71

|65

|144

|style='background: #ffffe6; |71

|0.30%

|0.43%

|0.34%

|0.69%

|style='background: #ffffe6; |0.34%

|Asian alone (NH)

|25

|22

|32

|72

|style='background: #ffffe6; |85

|0.16%

|0.13%

|0.17%

|0.35%

|style='background: #ffffe6; |0.40%

|Native Hawaiian or Pacific Islander alone (NH)

|style='background: #ffffe6; |5

|0.01%

|style='background: #ffffe6; |0.02%

|Other race alone (NH)

|14

|style='background: #ffffe6; |49

|0.09%

|0.02%

|0.07%

|style='background: #ffffe6; |0.23%

|Mixed race or Multiracial (NH)

|187

|299

|style='background: #ffffe6; |1,006

|0.99%

|1.44%

|style='background: #ffffe6; |4.75%

|Hispanic or Latino (any race)

|93

|139

|205

|322

|style='background: #ffffe6; |502

|0.58%

|0.84%

|1.08%

|1.55%

|style='background: #ffffe6; |2.37%

|Total

|15,916

|16,595

|18,979

|20,743

|style='background: #ffffe6; |21,184

|100.00%

|style='background: #ffffe6; |100.00%

2017 American Community Survey

As of the census of 2017, there were 20,554 people, 8,990

Cameron R-I School District
Clinton County R-III School District
East Buchanan County C-1 School District
Kearney R-I School District
Lathrop R-II School District
Lawson R-XIV School District
Osborn R-O School District
Smithville R-II School District
Stewartsville C-2 School District

Public schools

Cameron R-I School District – Cameron
Parkview Elementary School (PK-02)
Cameron Intermediate School (03-05)
Cameron Veterans Middle School (06-08)
Cameron High School (09-12)
Clinton County R-III School District – Plattsburg
Ellis Elementary School (PK-04)
Clinton County Middle School (05-08)
Plattsburg High School (09-12)
East Buchanan County C-1 School District – Gower
East Buchanan Elementary School (PK-05)
East Buchanan Middle School (06-08)
East Buchanan High School (09-12)
Lathrop R-II School District – Lathrop
Lathrop Elementary School (PK-05)
Lathrop Middle School (06-08)
Lathrop High School (09-12)

Public libraries

Cameron Public Library

Communities

thumb|right|Clinton County Courthouse in Plattsburg

Cities

Cameron (partly in DeKalb County)
Gower (partly in Buchanan County)
Holt (partly in Clay County)
Lathrop
Osborn (partly in DeKalb County)
Plattsburg (county seat)
Trimble

Village

Grayson
Turney

Census-designated places

Lake Arrowhead

Other unincorporated places

Barnesville
Braley
Converse
Haynesville
Hemple
Keystone
Lilly
Mecca
Perrin
Starfield

Politics

Local

The Republican Party predominantly controls politics at the local level in Clinton County. Republicans hold all but one of the elected positions in the county.

State

{| class="wikitable" style="float:right; font-size:95%;"

|+ Past Gubernatorial Elections Results

|- style="background:lightgrey;"

! Year

! Republican

! Democratic

! Third Parties

|align="center" bgcolor="#fff3f3"|2024

|align="center" bgcolor="#fff3f3"|71.67% 7,921

|align="center" bgcolor="#f0f0ff"|26.00% 2,874

|align="center" |2.33% 277

|align="center" bgcolor="#fff3f3"|2020

|align="center" bgcolor="#fff3f3"|69.46% 7,518

|align="center" bgcolor="#f0f0ff"|27.73% 3,001

|align="center" |2.82% 305

| style="text-align:center; background:#fff3f3;"|2016

| style="text-align:center; background:#fff3f3;"|58.97% 6,030

| style="text-align:center; background:#f0f0ff;"|37.76% 3,861

| style="text-align:center;"|3.27% 334

| style="text-align:center; background:#f0f0ff;"|2012

| style="text-align:center; background:#fff3f3;"|45.45% 4,461

| style="text-align:center; background:#f0f0ff;"|50.97% 5,003

| style="text-align:center;"|3.58% 351

| style="text-align:center; background:#f0f0ff;"|2008

| style="text-align:center; background:#fff3f3;"|40.51% 4,199

| style="text-align:center; background:#f0f0ff;"|57.00% 5,909

| style="text-align:center;"|2.49% 258

| style="text-align:center; background:#fff3f3;"|2004

| style="text-align:center; background:#fff3f3;"|49.06% 4,663

| style="text-align:center; background:#f0f0ff;"|49.51% 4,705

| style="text-align:center;"|1.43% 136

| style="text-align:center; background:#f0f0ff;"|2000

| style="text-align:center; background:#fff3f3;"|46.71% 3,943

| style="text-align:center; background:#f0f0ff;"|51.10% 4,313

| style="text-align:center;"|2.19% 185

| style="text-align:center; background:#f0f0ff;"|1996

| style="text-align:center; background:#fff3f3;"|29.96% 2,142

| style="text-align:center; background:#f0f0ff;"|67.87% 4,852

| style="text-align:center;"|2.17% 155

Clinton County is split into two Missouri House of Representatives District numbers 8 & 9. This change occurred after the mandatory redistricting caused by the 2020 census.