Mary Mitzi Lim Cajayon-Uy (born May 6, 1978), also known as Mitch Cajayon-Uy, is a Filipino politician who is the incumbent representative from the 2nd District of Caloocan in the House of Representatives of the Philippines since 2022 and previously from 2007 to 2013. She also served as the executive director of the Council for the Welfare of Children, an attached agency of the Department of Social Welfare and Development from 2017 to 2021. She also served as a city councilor of Caloocan.