Brian M. Kolb (born August 14, 1952) is the New York State assemblyman from the 129th District, and is the minority leader of the Assembly. He was unanimously chosen as minority leader in April 2009, following the resignation of Jim Tedisco.

Kolb, a Republican, has served in the Assembly since February 2000, when he won a special election. The 129th District is comprised by portions of Cayuga, Cortland, Onondaga, Ontario and Seneca counties in Upstate New York.

Kolb was born in Rochester, New York. He received his Associate of Arts degree from Saint Petersburg Junior College in 1980. From 1986–87 he was the Town Supervisor for the Town of Richmond, and therefore also on the Ontario County Board of Supervisors. In 1996, he received his B.S. from Roberts Wesleyan College, and continued on to receive his M.S. in 1998. He became an adjunct professor at Roberts Wesleyan in 2000, a post he continues to hold.

Kolb was chosen in a special election held in February 2000, and re-elected four times since that time. He won the November 2008 general election with 66 percent of the vote and ran uncontested in the November 2010 general election.