Haslett is a census-designated place (CDP) in Ingham County in the U.S. state of Michigan. It is located mostly within Meridian Charter Township with a small portion extending east into Williamstown Township. The population was 19,220 at the 2010 census. Haslett contains its own school district, as well as its own post office with the 48840 ZIP Code.
Zip Codes in Haslett, MI that we also serve: 48840 48823