Weidman is an unincorporated community and census-designated place (CDP) in Isabella County in the U.S. state of Michigan.

As an unincorporated community, Weidman has no legal autonomy of its own but does have its own post office with the 48893 ZIP Code.

The built-up center of town is in the southern part of the CDP, on the south side of Lake of the Hills on the Coldwater River.

The Nottawa Township section lies within the Isabella Indian Reservation.

The postal delivery area for the Weidman 48893 ZIP Code is much larger, including large portions of both Sherman and Nottawa townships, as well as portions of Coldwater and Gilmore townships on the north and Broomfield and Deerfield townships on the south, as well as the village of Lake Isabella and the western half of the community of Beal City.

The Incredible Dr. Pol is a Nat Geo Wild popular reality show that follows veterinarian Jan Pol, his family and employees, centered around his veterinarian office in Weidman.