Mary-Katherine Stone is an American politician from Vermont. She has been a Democratic member of the Vermont House of Representatives for the Chittenden-14 District since 2023.

Stone was selected to be a Future Caucus Innovation Fellow as a member of both the 2024 Strengthening Democracy cohort and 2025-2026 Prenatal-to-Three cohort, recognizing her dedication to cross-partisan collaboration and policymaking.

Stone is the daughter of an Egyptian immigrant father and an Alabamian mother.