Lapeer County is a county located in the U.S. state of Michigan. As of the 2020 Census, the population was 88,619. 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 stone". Lapeer County is located north of Detroit and east of Flint.