The Northwest Hills Planning Region is a planning region and county-equivalent in the U.S. state of Connecticut. It is served by the coterminous Northwest Hills Council of Governments (NHCOG). In 2022, planning regions were approved to replace Connecticut's counties as county-equivalents for statistical purposes, with full implementation occurring by 2024.
As of the 2020 United States census, there were 112,503 people living in the Northwest Hills Planning Region.
The following municipalities are members of the Northwest Hills Region: