|City of Plymouth|
|— City —|
|• Mayor||Mark Senter (R)|
|• Total||7.57 sq mi (19.61 km2)|
|• Land||7.53 sq mi (19.50 km2)|
|• Water||0.04 sq mi (0.10 km2) 0.53%|
|Elevation||797 ft (243 m)|
|• Estimate (2011)||10,032|
|• Density||1,332.4/sq mi (514.4/km2)|
|Time zone||EST (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|GNIS feature ID||0441379|
Plymouth is a city in Marshall County, Indiana, United States. The population was 10,033 at the 2010 census. The city is the county seat of Marshall County. Plymouth was the site of the first retail outlet of defunct U.S. retailer Montgomery Ward in 1926.
According to the 2010 census, the city has a total area of 7.57 square miles (19.6 km2), of which 7.53 square miles (19.5 km2) (or 99.47%) is land and 0.04 square miles (0.10 km2) (or 0.53%) is water.
2010 census 
As of the census of 2010, there were 10,033 people, 3,940 households, and 2,401 families residing in the city. The population density was 1,332.4 inhabitants per square mile (514.4 /km2). There were 4,451 housing units at an average density of 591.1 per square mile (228.2 /km2). The racial makeup of the city was 87.2% White, 0.9% African American, 0.6% Native American, 0.5% Asian, 8.3% from other races, and 2.5% from two or more races. Hispanic or Latino of any race were 20.0% of the population.
There were 3,940 households out of which 34.6% had children under the age of 18 living with them, 39.7% were married couples living together, 14.9% had a female householder with no husband present, 6.3% had a male householder with no wife present, and 39.1% were non-families. 33.5% of all households were made up of individuals and 15% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.19.
The median age in the city was 34.3 years. 27.9% of residents were under the age of 18; 9.3% were between the ages of 18 and 24; 25.9% were from 25 to 44; 21.9% were from 45 to 64; and 15.2% were 65 years of age or older. The gender makeup of the city was 47.9% male and 52.1% female.
2000 census 
As of the census of 2000, there were 9,840 people, 3,838 households, and 2,406 families residing in the city. The population density was 1,414.0 people per square mile (545.9/km²). There were 4,100 housing units at an average density of 589.2 per square mile (227.4/km²). The racial makeup of the city was 80.80% White, 0.63% African American, 0.45% Native American, 0.50% Asian, 6.19% from other races, and 1.43% from two or more races. Hispanic or Latino of any race were 14.99% of the population.
There were 3,838 households out of which 31.9% had children under the age of 18 living with them, 45.3% were married couples living together, 12.2% had a female householder with no husband present, and 37.3% were non-families. 31.4% of all households were made up of individuals and 14.4% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 3.11.
In the city the population was spread out with 26.1% under the age of 18, 12.4% from 18 to 24, 28.8% from 25 to 44, 18.0% from 45 to 64, and 14.8% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 93.5 males. For every 100 females age 18 and over, there were 89.5 males.
The median income for a household in the city was $34,505, and the median income for a family was $41,447. Males had a median income of $30,444 versus $21,293 for females. The per capita income for the city was $15,417. About 10.4% of families and 13.1% of the population were below the poverty line, including 15.9% of those under age 18 and 9.6% of those age 65 or over.
This area was part of the territory of the Potawatomi Native Americans, one of the historical tribes encountered by European-American settlers. In the nineteenth century, the United States government made numerous treaties to buy and extinguish Native American claims to land in the former Northwest Territory and the Southeast. The Indian Removal Act of 1830 authorized forcible removal if necessary. The United States government purchased this area under the Treaty of Tippecanoe in 1832.
Although many Potawatomi had relocated to Indian Territory in present-day Kansas, Chief Menominee and his band of the Yellow River refused to go. Militia under the authority of United States Army officers rounded them up and in September 1838, the band of 859 headed west, in what became known as the Potawatomi Trail of Death. They traveled more than 660 miles to Osawatomie, Kansas, with many of the Potawatomi walking. More than 40 of the tribal members died on the march.
In July 1982, five firefighters were killed when their fire truck overturned while responding to a call. The truck crashed on a curve near West School on state road 17. They were driving a tanker truck. When they made the turn, the water in the truck shifted which caused the truck to break through a road barrier.
Plymouth High School 
The Plymouth High School Speech Team has been successful on both the state and national levels. The team was the overall Indiana High School Forensic Association's state champion in 1997, as well as five consecutive years from 2000 to 2004, and also in 2009. As the champions, the team won the Ralph Lawson Trophy. The team also won the Class "AA" state championship each year from 1997 to 2004 and 2006 to 2009.
On the national level, Plymouth students regularly compete at the National Forensic League's national tournament. Plymouth students have earned national championships in Original Oratory in 2002, Duo Interpretation in 2004, and Prose Reading in 2005. In 2007, Head Coach David McKenzie was awarded the National Forensic League National Coach of the Year.
In 1977, Plymouth High School won the State Football Championship. Pete Buchanan from the 1977 team went on to play college football at Notre Dame.
In 1982, Scott Skiles led Plymouth High School to the boys basketball state championship, with a 75-74 double overtime victory over Gary Roosevelt High School. On March 24, 2007, Plymouth won the Indiana Class AAA boys' basketball championship. Plymouth beat Evansville Bosse in a 72-61 victory. Head coach Jack Edison was named National High School coach of the year. On March 1, 2008, Plymouth won the Indiana Class AAA Girls' Basketball Championship. The Lady Pilgrims defeated Indianapolis Chatard 47-46 at Conseco Fieldhouse in Indianapolis.
- "US Gazetteer files 2010". United States Census Bureau. Retrieved 2012-12-11.
- "American FactFinder". United States Census Bureau. Retrieved 2012-12-11.
- "Population Estimates". United States Census Bureau. Retrieved 2013-01-02.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- Indiana Atlas & Gazetteer. Yarmouth, Me.: DeLorme. 1998. p. 20. ISBN 0-89933-211-0.
- "2010 Census U.S. Gazetteer Files for Places – Indiana". United States Census. Retrieved 2012-04-21.
- Potawatomi Trail of Death Association
- "Best High Schools,", US NEWS AND WORLD REPORT
- "Indiana's Best Buys: An In-Depth Look at Hoosier High Schools" http://www.indianachamber.com/media/pdf/IndianasBestBuys2008.pdf
- NFL National Tournament Results through 2010 (National Forensic League, accessed 2011-Jun-25
- City of Plymouth, Indiana website
- Plymouth, Indiana Chamber of Commerce
- Plymouth School Corporation
- The Pilot News