Final results from the Corvallis City Championships held at Timberhill Tennis Club August 14-16, 1998.
Men's Singles | Women's Singles | Men's Doubles | Women's Doubles | Mixed Doubles
| Men’s Open Singles | Andy Koong def. Chad Evett 3-6, 6-3, 6-2 |
| Men’s A Singles | Joseph Santiago def. Curt Cook 6-1, 6-1 |
| Men’s B Singles | Colby Jager def. Wilbur Widicus 6-4, 6-4 |
| Men’s C Singles | Pete Domagala def. Herky Gottfried 6-4, 4-6, 6-3 |
| Women’s B Singles | Martha Daniels def. Kim Schlessinger 6-2, 6-4 |
| Women’s C Singles | Courtney Jensen def. Haley Wilson 6-2, 6-2 |
| Men’s Open Doubles | Andy Koong / Eric Bartee def. Chad Evett / Eric Evett 6-2, 3-6, 7-5 |
| Men’s A Doubles | Jason Arrington / Dave Traut def. Ian Weller / Ken Stevenson 6-4, 6-4 |
| Men’s B Doubles | Howard Nakano / Joseph Santiago def. Dale Dinwiddie / Henry Lee 6-3, 6-1 |
| Men’s C Doubles | Pete Domagala / Gene Johnston def. James Lee / Fred Gomez 6-0, 4-6, 6-1 |
| Women’s A Doubles | Laura Hyde / Virginia Dupuis def. Pam Edinger / Judy Hirsch 2-6,. 6-3, 7-5 |
| Women’s B Doubles | Arlene Burnham / Suzie Blair def. Dawn Long / Anna Warloe 6-2, 6-1 |
| Women’s C Doubles | Courtney Jensen / Krista Martin def. Tina Edinger / Brianna Klein 7-5, 6-2 |
| Mixed A Doubles | Dale Dinwiddie /Lynn Harper def. Laura Hyde / Ted Foulke 6-3, 6-0 |
| Mixed B Doubles | Henry Lee / Amy Ellingson def. Kim Schlessinger / Mark Fetkke 6-4, 6-2 |
| Mixed C Doubles | Herky Gottfried / Shikha Gottfried def. Ray Wilson / Haley Wilson 6-2, 6-1 |