Plymouth is home to 10,664 people in Indiana. Home values have more than doubled since 2000, reaching $131,800. 24% of adults hold a bachelor's degree or higher. 58% of homes are owner-occupied. That trails the Indiana median by roughly 19%. Density works out to 1,409 people per square mile.
At a glance
Lower income
median household income $58,623, below the US median
US median: $82,259
Mid-age
median age 37.7
US median: 38.9
Less educated
24% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Plymouth
What changed most since 1990
Hispanic share3.0% → 24.9%(+21.9 pts)US over the same years: +9.9 pts
Median home value (2024 dollars)$102,243 → $131,800(+29%)US over the same years: +67%
White share96.3% → 71.8%(−24.5 pts)US over the same years: −17.8 pts
Plymouth's population equals 23% of Marshall County's. Its number of foreign-born residents equals 58% of the county's. Its number of people who work from home equals 11% of the county's.
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)28.7%(178)
US avg: 26.4%
Gulf War (1990s)52.5%(326)
US avg: 24.3%
Vietnam era17.2%(107)
US avg: 33.1%
Korean War2.6%(16)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 621 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Plymouth, decade by decade
Plymouth population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
8,303
$54,664
$102,243
11.6%
8.9
2000
9,840
$62,856
$130,248
12.4%
36.4
2010
10,033
$48,563
$134,075
10.3%
45.6
2020
10,214
$49,020
$115,386
17.3%
56.4
2024
10,664
$58,623
$131,800
23.7%
52.7
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
