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

| Place | Player | Country | Score | To_par |
|---|---|---|---|---|
| 1 | Andy North | United States | 70-70=140 | –2 |
| T2 | Jack Nicklaus | United States | 73-69=142 | E |
| T2 | Gary Player | South Africa | 71-71=142 | E |
| T2 | J. C. Snead | United States | 70-72=142 | E |
| T5 | Bobby Clampett (a) | United States | 70-73=143 | +1 |
| T5 | Mark Hayes | United States | 73-70=143 | +1 |
| T5 | Hale Irwin | United States | 69-74=143 | +1 |
| T5 | Lee Trevino | United States | 72-71=143 | +1 |
| T9 | Seve Ballesteros | Spain | 75-69=144 | +2 |
| T9 | Andy Bean | United States | 72-72=144 | +2 |
| T9 | Phil Hancock | United States | 71-73=144 | +2 |
| T9 | Joe Inman | United States | 72-72=144 | +2 |
| T9 | Peter Oosterhuis | England | 72-72=144 | +2 |
| T9 | Dave Stockton | United States | 71-73=144 | +2 |