Plymouth Flag

Plymouth

County:
Marshall County
County Seat:
Yes
Area (mi²):
7.571
State:
Indiana

Plymouth is a city located in Marshall County, Indiana. Plymouth has a 2026 population of 11,456. It is also the county seat of Marshall County. Plymouth is currently growing at a rate of 1.84% annually and its population has increased by 12.16% since the most recent census, which recorded a population of 10,214 in 2020.

The median household income in Plymouth is $58,623 with a poverty rate of 13.48%. The median age in Plymouth is 37.7 years: 33 years for males, and 40.9 years for females. For every 100 females there are 104.5 males.

11.5K
Total Population
1,513
Density (mi²)
207 1.84%
Growth

Plymouth Population

Plymouth Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202611,4562071.84%
202511,2492071.87%
202411,042650.59%
202310,9772632.45%
202210,7142882.76%
202110,4262122.08%
202010,214-3-0.03%
20199,976-37-0.37%
201810,013-27-0.27%
201710,040-56-0.55%
201610,096-42-0.41%
201510,138-43-0.42%
201410,181560.55%
201310,125-10-0.1%
201210,135-13-0.13%
201110,148170.17%
201010,131980.98%
20009,8401,53718.51%
19908,3036107.93%
19807,693320.42%
19707,6611031.36%
19607,55885412.74%
19506,70499117.35%
19405,7134238%
19305,29095221.95%
19204,33850013.03%
19103,8381824.98%
19003,65693334.26%
18902,7231535.95%
18802,57000%

Median Age

Overall: 37.7 years
Female: 40.9 years
Male: 33 years

Plymouth Adults

There are 8,154 adults, (1,807 of whom are seniors) in Plymouth.

Sex Ratio

Female: 5,215 (48.9%)
Male: 5,449 (51.1%)

Demographics

The racial composition of Plymouth includes 79.99% White, 13.52% other race, and smaller percentages for Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White8,53079.99%
Other race1,44213.52%
Two or more races5044.73%
Black or African American780.73%
Asian780.73%
Native American250.23%
Native Hawaiian or Pacific Islander70.07%
Race
Population ↓
Percentage (of total)
Other race1,44213.52%
White8748.2%
Two or more races3283.08%
Native American150.14%
Race
Population ↓
Percentage (of total)
White7,65671.79%
Two or more races1761.65%
Black or African American780.73%
Asian780.73%
Native American100.09%
Native Hawaiian or Pacific Islander70.07%

Plymouth Marital Status

Economics and Income Statistics

Plymouth 's average per capita income is $46,726. Household income levels show a median of $58,623. The poverty rate stands at 13.48%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$99,384-
Families$85,887$90,003
Households$58,623$70,726
Non Families$42,385$46,266

$46,726

Average Income

$58,623

Median Household Income

13.48%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)