1978 U.S. Open (golf) First round First round

| Place | Player | Country | Score | To_par |
|---|---|---|---|---|
| 1 | Hale Irwin | United States | 69 | –2 |
| T2 | Bobby Clampett (a) | United States | 70 | –1 |
| T2 | Andy North | United States | 70 | –1 |
| T2 | J. C. Snead | United States | 70 | –1 |
| T5 | Bill Brask | United States | 71 | E |
| T5 | Billy Casper | United States | 71 | E |
| T5 | Al Geiberger | United States | 71 | E |
| T5 | Phil Hancock | United States | 71 | E |
| T5 | Gary Player | South Africa | 71 | E |
| T5 | Dave Stockton | United States | 71 | E |
| T5 | Bobby Wadkins | United States | 71 | E |