Principal cities include Enfield, Norwich, New London, and Groton.

The district is currently represented by Democrat Joe Courtney.

With a Cook Partisan Voting Index rating of D+3, it is one of the least Democratic districts in Connecticut, a state with an all-Democratic congressional delegation.

[2] For the 118th and successive Congresses (based on redistricting following the 2020 census), Connecticut's 2nd district contains all or portions of five planning regions and 64 municipalities.

[3] Capitol Planning Region (15) Lower Connecticut River Valley Planning Region (12) Northeastern Connecticut Planning Region (16) South Central Connecticut Planning Region (1) Southeastern Connecticut Planning Region (20) District organized from Connecticut's at-large congressional district in 1837.