Plymouth is a city located in Indiana. With a 2020 population of 9,799, it is the 83rd largest city in Indiana and the 3141st largest city in the United States. Plymouth is currently declining at a rate of -0.46% annually and its population has decreased by -2.33% since the most recent census, which recorded a population of 10,033 in 2010. Plymouth reached it's highest population of 10,076 in 2014. Spanning over 8 miles, Plymouth has a population density of 1,294 people per square mile.
The average household income in Plymouth is $46,689 with a poverty rate of 23.18%. The median rental costs in recent years comes to $683 per month, and the median house value is $93,400. The median age in Plymouth is 35.9 years, 33 years for males, and 38.7 years for females. For every 100 females there are 91.4 males.