The Southeastern Connecticut Planning Region is a planning region and county-equivalent in Connecticut.

It is served by the coterminous Southeastern Connecticut Council of Governments (SCCOG).

In 2022, planning regions were approved to replace Connecticut's counties as county-equivalents for statistical purposes, with full implementation occurring by 2024.

[2][3] As of the 2020 United States census, there were 280,430 people living in the Southeastern Planning Region.

[3] The following municipalities are members of the Southeastern Connecticut Region:[5] ^Plainfield