Mary M. Cheh /ˈtʃeɪ/ (born 1950[1]) is an American Democratic politician from Washington, D.C. From 2007 to 2023, she served on the Council of the District of Columbia representing Ward 3.

[3] There, she has received teaching and service awards and serves as a member and former chair of the George Washington Law Public Interest Committee.

Cheh works as a professor at the George Washington University Law School[6] and teaches bar review lectures during the summer months.

[citation needed] Cheh was first elected to the Council of the District of Columbia in 2006, defeating her Republican opponent Theresa Conroy.

[11] She has led five major Council investigations: CareFirst BlueCross BlueShield's failure to comply with its nonprofit mission,[12] 2008 election electronic voting failures[13] Mayoral personnel practices,[14] the improper donation of District fire trucks to the Dominican Republic,[15] and procurement practices at the Office of the Chief Technology Officer.

[citation needed] Cheh introduced the Taxicab Service Improvement Amendment Act of 2012, which requires taxis in the District to use GPS, credit card readers and modern meters, and uniform dome lights and color schemes.

Similarly, she co-sponsored introduced emergency measures to keep application-based services like Uber, Lyft, and Sidecar street legal.