Ngọc Lặc is a district (huyện) of Thanh Hóa province in the North Central Coast region of Vietnam.

As of 2003 the district had a population of 132,191.

[1] The district covers an area of 504 km².

The district capital lies at Ngọc Lặc.

This article about a location in Thanh Hóa Province, Vietnam is a stub.