| Frieda Martselos | |
| Honorific-Suffix: | MLA |
| Office: | Member of the Legislative Assembly of the Northwest Territories |
| Term Start: | October 1, 2019 |
| Term End: | November 14, 2023 |
| Predecessor: | Louis Sebert |
| Successor: | Jay MacDonald |
| Constituency: | Thebacha |
| Party: | non-partisan consensus government |
Frieda Martselos is a Canadian politician, who represented the electoral district of Thebacha in the Legislative Assembly of the Northwest Territories from 2019 to 2023.[1] She was first elected in the 2019 election, and was defeated by Jay MacDonald in the 2023 election.