There are 7 US Post Offices in Morgan County serving a total of 66,713 residents equating to 9,530 residents per post office. It's estimated that approximately 106,481 packages are handled across the 7 county post offices annually. Morgan County is a county located in the U.S. state of Indiana. As of 2010, the population was 68,894. The county seat is Martinsville. Morgan County is located between Indianapolis, in Marion County, and Bloomington, located in Monroe County. It is included in the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area. Two state highways, State Roads 37 and 67, carry large numbers of daily commuters between the two larger communities. The county is divided into 14 townships which provide local services."