Brian J. O'Neill (born December 23, 1949) is a Republican Councilman representing the Tenth District on the City Council of Philadelphia, Pennsylvania.

[1] Brian J. O’Neill was born in Philadelphia, the son of a city police officer.

Prior to his election to the city council, O’Neill worked as a Juvenile Probation Officer, as a Law Clerk in the Court of Common Pleas, and also operated a private attorney practice.

[3] He introduced the Philadelphia blunt ban in May 2006, which was adopted and signed by the mayor.

As of 2024, he is the only current Republican council member in Philadelphia, after Republicans lost the two at-large seats reserved by the City Charter for the minority party, to the Working Families Party.