Vadstena Municipality (Vadstena kommun) is a municipality in Östergötland County in southeast Sweden. Its seat is located in the city of Vadstena.
The old City of Vadstena was during the nation-wide local government reform of the 1970s merged into Motala Municipality in 1974. This "marriage" was unsuccessful and a "divorce" was soon agreed upon and in 1980 the present municipality was created. It contains, however, 12 original units.