Mark K. Keller (born January 14, 1954) is a former Republican member of the Pennsylvania House of Representatives for the 86th District.
He was elected in 2004 and left office at the end of his eighth term in November 2020.
He formerly sat on the House Agriculture & Rural Affairs, Game & Fisheries, Local Government, and Transportation Committees.
Representative Keller advocated for rural and agricultural issues and considered protecting farmers and small businesses top legislative priorities.
Keller and his wife, Sally, reside in Landisburg, Pennsylvania, and have one son, Bryan.