Brian Michael Crosby (born December 5, 1982) is an American politician from the Democratic Party and is a member of the Maryland House of Delegates representing District 29B.

Crosby later attended Western Michigan University Cooley Law School where he received his J.D.

[1] In 2021, House Speaker Adrienne A. Jones appointed Crosby to serve as vice chair of the Economic Matters Committee, succeeding Delegate Kathleen Dumais.

[5][6] He criticized a bill introduced that year that would allow teachers to carry guns in schools,[7] later calling it the "dumbest policy in American history.

"[6] During the 2022 legislative session, Crosby voted for a bill that would prevent school boards from discriminating against people on the basis of race, ethnicity, color, religion, sex, age, national origin, marital status, sexual orientation, gender identity, or disability; the bill passed the House of Delegates by a vote of 94-36 and the Senate by a 34-13 vote, and became law without the governor's signature.

[8] During a debate on the bill, Crosby voted against an amendment that would have blocked public schools from discussing gender and sexuality in the classroom.

[5] In 2020, Crosby voted in favor of legislation that would require additional background checks on secondary firearm transfers.