Plymouth is located in Mcdonough County, IL. The population is 458, making Plymouth the 9th largest city in Mcdonough County.
There are 0 public schools in Plymouth with an average Homefacts rating of NA. The total crime rate for Plymouth is very low , and there are 0 registered sex offenders residing in the city. Unemployment in Plymouth is very high and the median home sales price is $0. Detailed and up-to-date Plymouth property reports are available for any property address.
Cities near Plymouth include St. Mary Township, Lamoine Township and Augusta.