| Season | Champion | Amherst-Wesleyan | Wesleyan-Williams | Amherst-Williams |
| 1978-79 | Williams | Wesleyan 70, at Amherst 36 | at Williams 82, Wesleyan 45 | at Williams 86, Amherst 36 |
| 1979-80 | Williams | Amherst 61, at Wesleyan 61 | at Williams 76, Wesleyan 45 | Williams 103, at Amherst 37 |
| 1980-81 | Williams | at Amherst 72, Wesleyan 60 | Williams 64, at Wesleyan 39 | at Williams 89, Amherst 51 |
| 1981-82 | Williams | Amherst 61, at Wesleyan 60 | at Williams 91, Wesleyan 31 | Williams 84, at Amherst 45 |
| 1982-83 | Williams | at Amherst 74, Wesleyan 53 | Williams 89, at Wesleyan 42 | at Williams 86, Amherst 53 |
| 1983-84 | Williams | Amherst 77, at Wesleyan 42 | Williams 98, Wesleyan 39* | Williams 87, at Amherst 45 |
| 1984-85 | Williams | at Amherst 58, Wesleyan 37 | Williams 75, at Wesleyan 38 | at Williams 106, Amherst 34 |
| 1985-86 | Williams | Amherst 72, at Wesleyan 47 | at Williams 77, Wesleyan 22 | at Williams 93, Amherst 38 |
| 1986-87 | Amherst | at Amherst 130, Wesleyan 83 | Williams 64, at Wesleyan 29 | at Amherst 135, Williams 126 |
| 1987-88 | Williams | Amherst 67, at Wesleyan 54 | at Williams 111, Wesleyan 74 | Williams 143, at Amherst 123 |
| 1988-89 | Williams | at Amherst 194, Wesleyan 92 | Williams 66, at Wesleyan 20 | at Williams 169, Amherst 132 |
| 1989-90 | Williams | Amherst 74, at Wesleyan 66 | at Williams 201, Wesleyan 96 | Williams 178, at Amherst 122 |
| 1990-91 | Williams | at Amherst 126, Wesleyan 117 | Williams 222, at Wesleyan 68 | at Williams 224, Amherst 76 |
| 1991-92 | Williams | at Wesleyan 156, Amherst 139 | at Williams 180, Wesleyan 66 | Williams 174, at Amherst 72 |
| 1992-93 | Williams | at Wesleyan 131, Amherst 112 | Williams 105, at Wesleyan 92 | at Williams 181, Amherst 74 |
| 1993-94 | Williams | at Wesleyan 131, Amherst 110 | at Williams 202, Wesleyan 93 | Williams 180, at Amherst 120 |
| 1994-95 | Williams | at Amherst 144, Wesleyan 99 | Williams 167, at Wesleyan 73 | at Williams 196.5, Amherst 103.5 |
| 1995-96 | Williams# | Amherst 165, at Wesleyan 77 | Did not meet | Williams 161, at Amherst 133 |
| 1996-97 | Williams | at Amherst 192, Wesleyan 107 | Williams 202, at Wesleyan 97 | at Williams 205, Amherst 95 |
| 1997-98 | Williams | Amherst 130, at Wesleyan 111 | at Williams 173, Wesleyan 69 | Williams 176, at Amherst 124 |
| 1998-99 | Williams | at Amherst 157, Wesleyan 131 | Williams 220, at Wesleyan 80 | at Williams 176, Amherst 118 |
| 1999-00 | Williams | Amherst 159, at Wesleyan 121 | at Williams 177, Wesleyan 107 | Williams 172, at Amherst 128 |
| 2000-01 | Williams | at Amherst 122, Wesleyan 121 | Williams 198, at Wesleyan 107 | at Williams 201, Amherst 98 |
| 2001-02 | Williams | Amherst 133, at Wesleyan 75 | at Williams 136, Wesleyan 80 | Williams 172, at Amherst 128 |
| 2002-03 | Williams | at Amherst 138, Wesleyan 92 | Williams 179, at Wesleyan 97 | at Williams 216, Amherst 84 |
| 2003-04 | Amherst | Amherst 163, at Wesleyan 80 | Williams 198, at Wesleyan 100 | at Amherst 158, Williams 141 |
| 2004-05 | Williams | at Amherst 155, Wesleyan 118 | at Williams 178, Wesleyan 113 | at Williams 155, Amherst 141 |
| 2005-06 | Williams | Amherst 169, at Wesleyan 106 | Williams 186, at Wesleyan 98 | Williams 171, at Amherst 127 |
| 2006-07 | Amherst | at Amherst 144, Wesleyan 112 | at Williams 186, Wesleyan 102 | Amherst 155, at Williams 143 |
| 2007-08 | Amherst | Amherst 143, at Wesleyan 95 | Williams 212, at Wesleyan 88 | at Amherst 152.5, Williams 147.5 |
| 2008-09 | Williams | at Amherst 132, Wesleyan 89 | at Williams 219, Wesleyan 77 | at Williams 194, Amherst 104 |
| 2009-10 | Williams | Amherst 125, at Wesleyan 108 | Williams 174, at Wesleyan 111 | Williams 207, at Amherst 91 |
| 2010-11 | Williams |
at Amherst 136, Wesleyan 98 | at Williams 195, Wesleyan 100 | at Williams 203, Amherst 97 |
| 2011-12 | Williams |
Amherst 184, at Wesleyan 46 | Williams 167, at Wesleyan 91 | Williams 185, at Amherst 115 |
| 2012-13 | Williams |
Amherst 167, at Wesleyan 109 | at Williams 194, Wesleyan 97 | at Williams 187, Amherst 107 |
| Summary of titles: Amherst - 4 (most recent: 2007-08) Williams - 31 (most recent: 2012-13) *Wesleyan and Williams swam in their respective pools and compared times over the phone. #Wesleyan and Williams did not meet due to snow. Williams is the declared champion. |
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