Bittern is a town on the Mornington Peninsula in Melbourne, Victoria, Australia, 61 km (38 mi) south-east of Melbourne's Central Business District, located within the Shire of Mornington Peninsula local government area.

It is served by Bittern railway station on the Stony Point greater-metropolitan line and by the 782 bus route operated by Ventura Bus Lines between Frankston and Flinders.

[2] Bittern is named after the shy wetland bird, the Australasian bittern, which reflects the town's location amongst significant areas of native bushland and dense coastal vegetation.

[4] The railway opened for Bittern in 1889 and small scale commercial development began during the early 1900s.

The town also has a primary school, Bittern Primary School, and a small basketball and netball stadium known as Graham Myers Sports Stadium or Bittern Memorial Stadium, which features an indoor court used for basketball, netball or floorball and four outside courts used for netball.