| Date | Location | Result | |
| Nov 28, 1998 | Ames, Iowa | Texas A&M 3, Iowa State 0 (15-13,15-5,15-5) | Box score |
| Nov 27, 1998 | Ames, Iowa | Texas 3, Iowa State 0 (15-8,15-9,15-13) | Box score |
| Nov 21, 1998 | Ames, Iowa | Kansas 3, Iowa State 2 (13-15,15-5,7-15,15-13,15-9) | Box score |
| Nov 20, 1998 | Ames, Iowa | Oklahoma 3, Iowa State 0 (15-9,15-4,15-4) | Box score |
| Nov 14, 1998 | Manhattan, Kan. | Kansas State 3, Iowa State 0 (15-9,15-1,15-4) | Box score |
| Nov 11, 1998 | Columbia, Mo. | Missouri 3, Iowa State 0 (15-3,15-6,15-11) | Box score |
| Nov. 7, 1998 | Austin, Texas | Texas 3, Iowa State 0 (15-4,15-0,15-7) | Box score |
| Nov. 6, 1998 | College Station, TX | Texas A&M 3, Iowa State 0 (15-3,15-3,15-1) | Box score |
| Oct 31, 1998 | Ames, Iowa | Nebraska 3, Iowa State 0 (15-6,15-2,15-1) | Box score |
| Oct 30, 1998 | Ames, Iowa | Colorado 3, Iowa State 0 (15-2,15-7,15-2) | Box score |
| Oct 24, 1998 | Waco, Texas | Baylor 3, Iowa State 0 (15-5,15-7,15-4) | Box score |
| Oct 23, 1998 | Lubbock, Texas | Texas Tech 3, Iowa State 1 (15-0,15-3,12-15,15-6) | Box score |
| Oct 17, 1998 | Norman, Okla. | Iowa State 3, Oklahoma 1 (9-15,15-8,15-12,15-13) | Box score |
| Oct 16, 1998 | Lawrence, Kan. | Kansas 3, Iowa State 0 (15-12,15-8,16-14) | Box score |
| Oct. 9, 1998 | Ames, Iowa | Kansas State 3, Iowa State 0 (15-2,15-1,15-10) | Box score |
| Oct. 7, 1998 | Ames, Iowa | Missouri 3, Iowa State 0 (15-9,15-6,15-13) | Box score |
| Oct. 3, 1998 | Ames, Iowa | Texas Tech 3, Iowa State 0 (15-7,15-9,15-1) | Box score |
| Oct. 2, 1998 | Ames, Iowa | Baylor 3, Iowa State 0 (15-2,15-10,15-9) | Box score |
| Sep 27, 1998 | Boulder, Colo. | Colorado 3, Iowa State 0 (15-8,15-4,15-3) | Box score |
| Sep 25, 1998 | Lincoln, Neb. | Nebraska 3, Iowa State 0 (15-1,15-5,15-6) | Box score |
| Sep 22, 1998 | Des Moines, Iowa | Drake 3, Iowa State 1 (15-9,15-9,8-15,15-11) | Box score |
| Sep 19, 1998 | Kalamazoo, Mich. | Western Illinois 3, Iowa State 2 (15-9,11-15,9-15,15-1,15-11) | Box score |
| Sep 19, 1998 | Kalamazoo, Mich. | West Virginia 3, Iowa State 2 (15-7,17-15,14-16,13-15,15-11) | Box score |
| Sep 18, 1998 | Kalamazoo, Mich. | Western Michigan 3, Iowa State 0 (15-12,15-7,15-5) | Box score |
| Sep 15, 1998 | Ames, Iowa | Northern Iowa 3, Iowa State 0 (15-3,15-1,15-4) | Box score |
| Sep 12, 1998 | Ames, Iowa | Wisconsin-Milwaukee 3, Iowa State 0 (15-6,15-6,15-7) | Box score |
| Sep 12, 1998 | Ames, Iowa | Iowa State 3, Chicago State 0 (15-2,15-4,15-6) | Box score |
| Sep 11, 1998 | Ames, Iowa | Montana 3, Iowa State 1 (15-12,11-15,15-11,15-10) | Box score |
| Sep 11, 1998 | Ames, Iowa | IUPUI 3, Iowa State 2 (7-15,14-16,15-13,15-7,15-13) | Box score |
| Sep. 5, 1998 | Fairbanks, Alaska | Iowa State 3, Alaska-Fairbanks 2 (12-15,10-15,18-16,15-8,15-9) | Box score |
| Sep. 4, 1998 | Fairbanks, Alaska | Duke 3, Iowa State 0 (15-8,15-13,15-12) | Box score |
| Sep. 3, 1998 | Fairbanks, Alaska | UNLV 3, Iowa State 0 (15-13,15-5,15-12) | Box score |