Carla J Inhulsen (Postmaster)
carla.j.inhulsen@usps.gov
319 N Washington St
Owosso, MI 48867
Owosso, MI 48867
The Owosso Post Office is located in the state of Michigan within Shiawassee County. This location serves 28,264 Owosso residents with a median income of $43,105. It's estimated that approximately 45,112 packages pass through this post office each year.