• county
  • FIPS 29129

Mercer County, Missouri

Mercer County had 3,452 residents in the Census Vintage 2024 estimate, on 453.8 square miles of land. It ranks 114th of 115 in Missouri by population and 95th by land area.

Population
3,452
#114 of 115 in Missouri · #2,925 in US
Area
453.8 sq mi
#95 of 115 in Missouri · #2,255 in US
Density
7.6 / sq mi
#111 of 115 in Missouri · #2,660 in US
Median household income
$55,282
#63 of 115 in Missouri · #2,299 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Mercer County within Missouri. Pin: Jefferson City.

Measure from here

Tools and pages that start from Mercer County

Mercer County population, land area and income

Mercer County had 3,452 residents in the Census Vintage 2024 estimate, on 453.8 square miles of land. It ranks 114th of 115 in Missouri by population and 95th by land area. That works out to 7.6 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Missouri has 19,100 residents, so Mercer County has 18% of the typical county's population.

Its SAIPE 2023 median household income of $55,282 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

3,452

3144th1st

2925th of 3,144 (US)

Land area

454 sq mi

3144th1st

2255th of 3,144 (US)

Density

7.6 / sq mi

3144th1st

2660th of 3,144 (US)

Median household income

$55,282

3143rd1st

2299th of 3,143 (US)

Rank within Missouri (115)

Population

3,452

115th1st

114th of 115 (MO)

Land area

454 sq mi

115th1st

95th of 115 (MO)

Density

7.6 / sq mi

115th1st

111th of 115 (MO)

Median household income

$55,282

115th1st

63rd of 115 (MO)

How Mercer County's population changed since 2020

Mercer County lost 60 residents between the July 2020 and July 2024 estimates, a drop of 1.7%. That ranks 100th of 115 in Missouri for growth. The median Missouri county changed by +1.4%, and the state as a whole by +1.5%.

Since the April 2020 estimates base, Mercer County recorded 238 births and 218 deaths, a natural change of +20. Net international migration added +47 and net domestic migration, people moving to or from other US counties, came to -146. The largest single component was domestic migration, which removed 146 people.

3,51220203,48020213,46920223,49920233,4522024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
238
Deaths
218
Net international migration
+47
Net domestic migration
-146
Change, July 2023 to July 2024
-47

Where Mercer County is

The Census internal point of Mercer County is at 40.421400, -93.567600. It sits in UTM zone 15N. The map shades Missouri's 115 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Mercer County outlined. Dots are towns of 1,000+ people with residents in it.

Pettis County: +1.8%Henry County: +2.7%Texas County: +5.7%Madison County: +1.8%St. Louis city: -6.9%Cole County: +1.3%Washington County: +0.6%Macon County: -0.1%Barton County: +0.8%Grundy County: +0.1%Cedar County: +5.7%Randolph County: -1.6%Ray County: +0.3%Caldwell County: +2.0%Benton County: +6.1%Douglas County: +5.9%Shannon County: +3.4%Dade County: +0.5%Wright County: +7.1%Gentry County: +2.6%Lawrence County: +3.0%Cooper County: +2.9%Hickory County: +5.6%Moniteau County: +0.5%Dent County: +2.3%Monroe County: +2.3%Maries County: +0.7%Bollinger County: +0.5%Clinton County: +2.4%Knox County: +0.0%Webster County: +7.8%Harrison County: +0.4%Pulaski County: -0.1%Adair County: +1.5%Warren County: +7.7%Daviess County: +1.3%Audrain County: -1.9%Howard County: -0.1%Linn County: +0.4%Saline County: -0.1%Miller County: +3.6%Dallas County: +4.3%Morgan County: +6.7%New Madrid County: -6.8%Newton County: +4.8%Oregon County: +1.0%Franklin County: +2.3%Greene County: +2.9%Ralls County: +1.4%Lafayette County: +1.4%Livingston County: +4.8%McDonald County: +3.3%Barry County: +3.1%Cape Girardeau County: +2.2%Carroll County: -0.6%Christian County: +7.6%Vernon County: +0.6%Carter County: +3.0%Andrew County: -0.1%Jasper County: +2.9%Worth County: -4.9%Lincoln County: +10.1%Marion County: -0.2%Holt County: +1.2%Howell County: +2.4%St. Francois County: +1.6%Chariton County: +0.1%Butler County: -0.6%Iron County: -1.0%Perry County: +0.7%Cass County: +5.3%St. Louis County: -1.0%Dunklin County: -4.3%Wayne County: -1.1%Ozark County: +6.7%Laclede County: +1.9%Reynolds County: -2.5%Lewis County: -1.9%Taney County: +1.2%Ripley County: +0.4%Ste. Genevieve County: +0.4%Scotland County: -0.1%Putnam County: -3.1%Schuyler County: +1.5%Shelby County: -2.8%Boone County: +4.4%Mercer County: -1.7%Platte County: +5.6%Camden County: +3.1%Bates County: +2.1%Johnson County: +3.4%Sullivan County: -3.8%Atchison County: -3.1%Scott County: -0.2%Montgomery County: +2.0%Jefferson County: +2.2%Clark County: -0.5%Callaway County: +1.8%St. Clair County: +5.4%Buchanan County: -1.1%Pemiscot County: -7.6%Polk County: +4.6%Phelps County: +2.5%Stone County: +4.6%Osage County: +1.7%Clay County: +3.6%Nodaway County: -2.4%Crawford County: -1.0%Jackson County: +1.4%St. Charles County: +4.3%Mississippi County: -3.1%Pike County: +3.1%Stoddard County: -0.7%Gasconade County: -0.7%DeKalb County: -14.8%
Change 2020 to 2024
  1. < -0.7%
  2. < +0.5%
  3. < +2.0%
  4. < +3.6%
  5. ≥ +3.6%
no data

Orange pin: Mercer County internal point. Dark pin: Jefferson City.

Internal point

Decimal
40.421400, -93.567600
DMS
40°25'17.04"N 93°34'3.36"W
UTM
15N 451848.8E 4474684.9N
Geohash
9zjmyy6ps
Plus code
86G8CCCJ+HX

Towns in Mercer County

No incorporated place of 1,000 or more people has residents in Mercer County. Its 3,452 residents live in smaller towns, census-designated places, or unincorporated land, which the subcounty estimates do not list at this size.

Counties bordering Mercer County

The Census 2024 county adjacency file lists 6 neighbors for Mercer County, including 2 across a state line. The most populous is Grundy County, MO, with 9,766 residents. Distances run between Census internal points in a straight line.

Distance to Jefferson City and the nearest big city

Jefferson City is 147.4 miles SSE of Mercer County's internal point in a straight line. The nearest place of 100,000 or more is Des Moines, IA (population 213,096), 79.6 miles away. The nearest place of 10,000 or more is Kirksville, MO (population 17,841), 54.6 miles away.

Mercer County FIPS code

The FIPS code of Mercer County is 29129: state code 29 for Missouri plus county code 129. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $55,282.

Questions people ask

What is the population of Mercer County, Missouri?

The Census Vintage 2024 estimate for July 1, 2024 is 3,452. That is down 60 people (1.7%) from the July 2020 estimate of 3,512.

What is the FIPS code of Mercer County?

29129. The first two digits (29) are Missouri; the last three (129) identify the county.

What is the largest town in Mercer County?

No incorporated place of 1,000 or more people has residents in Mercer County. Its people live in smaller towns, census-designated places or unincorporated land.

Which counties border Mercer County?

6 county-equivalents border it in the Census 2024 adjacency file: Grundy County, MO; Harrison County, MO; Decatur County, IA; Wayne County, IA; Sullivan County, MO; Putnam County, MO.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.