There are 11 US Post Offices in Lapeer County serving a total of 83,561 residents equating to 7,596 residents per post office. It's estimated that approximately 133,373 packages are handled across the 11 county post offices annually. Lapeer County is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 88,319. The county seat is Lapeer. The county was created on September 18, 1822, and was fully organized on February 2, 1835. The name is a corruption of the French la pierre, which means \"the flint.\" Lapeer County is included in the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area."