The Board of Selectmen meets on the first and third Tuesday of every month at 7:00 pm in the Adella G. Urban Administrative Offices Conference Room. The Board consists of the First Selectmen and four additional members each of whom shall be known as Selectmen. Each Selectmen shall serve for a term of four years with elections of three and two positions occurring respectively every successive election, so that there will be an element of continuity in Board membership. A vacancy occurring in the office of the First Selectman or Selectman shall be filled in the manner prescribed in Section 9-222 of the Connecticut General Statutes. The Board of Selectmen consist of the following members:
| Selectman | Term | Address | Office | |
| (R) Steven M. Everett - First Selectman | 11/24/25 - 11/26/29 | 534 Route 87 | severett [at] columbiact.gov (severett[at]columbiact[dot]gov) | 860-228-0110 |
| (D) Judith Ortiz (Deputy First Selectman) | 11/27/23 - 11/22/27 | 15 Columbia Landing | 860-228-0110 | |
| (D) William O'Brien | 11/25/19 - 11/27/23 | 164 Pine St. | 860-228-0110 | |
| (R) Rachel Riendeau | 11/24/25 - 11/26/29 | 310 Route 66 | 860-228-0110 | |
| (D) Robert Hellstrom | 11/24/25 - 11/26/29 | 44 Doubleday Rd. | 860-228-0110 |