Nathaniel Patrick Crosby is an American golfer. He won the 1981 U.S. Amateur and played on the winning 1982 Eisenhower Trophy and 1983 Walker Cup teams. He turned professional but had little success and was later reinstated as an amateur. He is the seventh child and sixth son of Bing Crosby.

The United States Amateur Championship, commonly known as the U.S. Amateur, is the leading annual golf tournament in the United States for amateur golfers. It is organized by the United States Golf Association and is currently held each August over a 7-day period.