| Ontario Open Invitational | |
| Location: | Ontario, California |
| Establishment: | 1961 |
| Course: | Whispering Lakes Golf Course |
| Par: | 71 |
| Tour: | PGA Tour |
| Format: | Stroke play |
| Month Played: | October |
| Final Year: | 1962 |
| Aggregate: | 276 Al Geiberger (1962) |
| To-Par: | −8 as above |
| Final Champion: |  Al Geiberger |
| Map: | USA#USA California |
| Map Relief: | yes |
| Map Label: | Whispering Lakes GC |
| Coordinates: | 34.021°N -117.605°W |
The Ontario Open was a golf tournament on the PGA Tour that was played in 1961 and 1962 at the Whispering Lakes Golf Course in Ontario, California, which opened in 1956.[1]
The 1961 tournament, played from October 12 - 15, was won by 42-year-old Eric Monti of Los Angeles, when he sank an 8-foot birdie putt on the second extra hole of a three-way sudden death playoff with George Bayer and Bobby Nichols.[2] The winners share was $2,800 out of a total purse of $20,000.[3]
In the 1962 tournament, played October 18 - 21, Al Geiberger[4] won his first PGA Tour event by one stroke over five other golfers. He won $3,500 from a $27,500 purse.[5]
| Year | Winner | Score | To par | Margin of victory | Runners-up | |
|---|---|---|---|---|---|---|
| Ontario Open Invitational | ||||||
| 276 | −8 | 1 stroke | Gardner Dickinson Bob Goalby Tommy Jacobs Chuck Rotar John Ruedi | |||
| Ontario Open | ||||||
| 277 | −3 | Playoff | George Bayer Bobby Nichols | |||