Olin Douglas Browne (born May 22, 1959) is an American professional golfer who plays on the PGA Tour as well as the Champions Tour.

Browne was born in Washington, D.C. He graduated from St. Albans School in 1977. He then went on to Occidental College in 1981. He turned professional in 1984. He lives in Hobe Sound, Florida. He has featured in the top 50 of the Official World Golf Ranking.

Browne won three times on the PGA Tour. On August 8, 2007, Browne was named one of the assistant captains for the 2008 United States Ryder Cup team.

At the 1998 Masters Tournament, Browne and Scott Simpson both carded a quadruple bogey on the opening hole of the first round - the worst start in the history of the tournament.

Browne qualified for the 2005 U.S. Open at Pinehurst by shooting a final round 59 in the qualifying tournament. He shared the lead the first two days of the Open, dropping into a tie for second going into the final day. He shot a final round 80 to drop to T-23rd.

Browne played in his first Champions Tour event in 2009 at The Principal Charity Classic, where he shared the first round lead but struggled on the weekend. He captured his first Champions Tour victory at the 2011 U.S. Senior Open, making his maiden win on tour a senior major championship. Browne held off the challenge of Mark O'Meara on Sunday to prevail by three strokes and become only the fifth player in professional golf history to win on the Nationwide Tour, the PGA Tour and the Champions Tour.

In 2011 and 2012, Browne worked for ESPN as on-course reporter during the network's golf telecasts. However, he was replaced by Dottie Pepper in 2013.

He is currently a member of Wolferts Roost Country Club in Albany, New York. Browne has a son, Olin Jr., who is also a professional golfer.