Tam Đảo is a rural district (huyện) of Vĩnh Phúc province in the Red River Delta region of northern Vietnam.

As of 2003 the district had a population of 65,812.

[1] The district covers an area of 236 km².

The district capital lies at Hợp Châu town.

This article about a location in Vĩnh Phúc Province, Vietnam is a stub.