The United States Open Championship, commonly known as the U.S. Open, is the annual open golf tournament of the United States, which is established in 1895. It is staged by the United States Golf Association in mid-June, scheduled such that the final round is always played on the third Sunday, which is Father's Day. It is one of the four major championships in golf and is on the official schedule of both the PGA Tour and the European Tour. From this year it will also be an official money event on the Asian Tour, with 50% of Asian Tour member's earnings counting towards the Order of Merit.

The U.S. Open is staged at a variety of courses, set up in such a way that scoring is very difficult with a premium placed on accurate driving, and the course is longer than normal and will have a high cut of rough, hilly greens and pinched fairways. Some courses that are attempting to get into the rotation for the U.S. Open will normally be rebuilt to have these features. The most notable of the "Open Doctors" who take on these projects is Rees Jones. There is no lower age limit and the youngest ever qualifier was 15-year-old Tadd Fujikawa of Hawaii, who qualified in 2006. The top fifteen finishers at the U.S. Open are fully exempt from qualifying for the following year's Open, and the top eight are automatically invited to the following season's Masters.