Plymouth, IN Profile: Facts, Map & Data


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Plymouth, Indiana - Basic Facts

The City of Plymouth had a population of 10,167 as of July 1, 2017. Plymouth ranks in the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Indiana. See peer rankings below.

The primary coordinate point for Plymouth is located at latitude 41.3494 and longitude -86.3194 in Marshall County. The formal boundaries for the City of Plymouth (see map below) encompass a land area of 7.53 sq. miles and a water area of 0.04 sq. miles. Marshall County is in the Eastern time zone (GMT -5). The elevation is 797 feet.

The City of Plymouth (GNIS ID: 2396241) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Plymouth is located within Township of Center, a minor civil division (MCD) of Marshall County.

Beneath the boundary map are tables with Plymouth population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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City of Plymouth, IN Boundary Map

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Boundary Maps: Township of Center | Marshall County | Indiana Counties

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Plymouth, IN Data & Demographics (As of July 1, 2017)


Total Population 10,167
Daytime Population: Workers 11,114
Daytime Population: Residents 5,380
Total Daytime Population (TDP) 16,494
Ratio TDP/Total Population1 1.62
Population in Households 9,946
Population in Familes 7,801
Population in Group Qrtrs 221
Population Density2 1,350
Diversity Index3 53


Median Household Income $38,541
Average Household Income $51,356
Per Capita Income $20,241


Total Housing Units 4,495 (100%)
Owner Occupied HU 2,293 (51.0%)
Renter Occupied HU 1,691 (37.6%)
Vacant Housing Units 511 (11.4%)
Median Home Value $108,904
Average Home Value $128,227


Total Households 3,984
Average Household Size 2.5
Family Households 2,475
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.18% -0.01%
Households 0.15% -0.05%
Families 0.42% -0.16%
Median Household Income   2.59%
Per Capita Income   2.94%

Plymouth, IN - Peer Comparisons by Rank and Percentile

The table below compares Plymouth to the other 680 incorporated cities, towns and CDPs in Indiana by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 79 89th
Population Density # 334 51st
Diversity Index # 30 96th
Median Household Income # 583 14th
Per Capita Income # 571 16th

Additional comparisons and rankings can be made with a VERY EASY TO USE Indiana Census Data Comparison Tool.

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