There are 17 US Post Offices in Montcalm County serving a total of 66,093 residents equating to 3,888 residents per post office. It's estimated that approximately 105,492 packages are handled across the 17 county post offices annually. Montcalm County is a county located in the U.S. state of Michigan. The Southwestern Portion of the county ( referring mostly to Greenville) identifies strongly as \" West Michigan\", while the rest of the county classifies themselves as being located within the Central portion of Lower Michigan. As of the 2010 census, the population was 63,342. The county seat is Stanton. The county is named for General Marquis Louis-Joseph de Montcalm, French military commander of troops in Canada during the French and Indian War. The county was set off in 1831 and organized in 1850. Montcalm County is included in the Grand Rapids-Wyoming, MI Metropolitan Statistical Area."