Proper noun
One of 99 counties in Iowa, United States. County seat: Le Mars. It was named after Plymouth, MA.
One of 14 counties in Massachusetts, United States. County seats: Plymouth and Brockton.
Source: en.wiktionary.orgA complaint and affidavit filed Thursday in Plymouth County District Court said Thomas Knapp, of Merrill, confessed to shooting 51-year-old Kevin Juzek in May during a disturbance at their home. Source: Internet