Lonnie Dean Nielsen (born June 29, 1953) is an American professional golfer.
Nielsen is currently a member of the Champions Tour. He was a member of the PGA Tour for five years but did not win any tournaments. He has won over 30 other tournaments though, most of which were played in New York. He won his first Champions Tour event at the Commerce Bank Championship. His second Champions Tour win came a in 2009 at the Dick's Sporting Goods Open where he came from 3 behind Fred Funk in the final round with a 9 under par 63 to win by 3 strokes.
DNP = Did not play CUT = missed the half-way cut "T" = tied Green background for wins. Yellow background for top-10.