Philip Arnold Blackmar (born September 22, 1957) is an American professional golfer. He played on the PGA Tour from 1985 to 2000 and now plays on the Champions Tour. He was the tallest player on the PGA Tour during his time on tour, standing 6'7".

Blackmar was born in San Diego, California. He played college golf at the University of Texas where he was a three-time All-Southwest Conference selection. He graduated in 1979 with a degree in finance and turned pro in 1980.

Blackmar played on mini-tours for a few years before earning his 1985 PGA Tour card by finishing second at the 1984 qualifying school. He won three PGA Tour events, all in playoffs: 1985 Canon Sammy Davis Jr.-Greater Hartford Open, 1988 Provident Classic, and 1997 Shell Houston Open. He stopped playing the tour after the 2000 season and worked as an analyst and commentator for U.S. TV networks.

After turning 50 in September 2007, Blackmar began playing on the Champions Tour. He won his first Champions Tour event in 2009 at the AT&T Championship by one stroke over three players. He went 36 holes bogey-free over the weekend in San Antonio, Texas.

Blackmar is married to the former Carol Bragdon, who is the head coach of the Texas A&M University-Corpus Christi women's golf team and has four children.