District 2 Capital League
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District 3 Far West League
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District 6 Skyline Conference
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District 7 Greater Oregon League
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District 1 Portland Interscholastic League 1956-2006
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District 2 Wilco League 1959-1973
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District 3 Wilco League 1974-1982
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District 2 Metro League 1974-2006
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District 3 Metro League 1959-1973
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District 3 Mt. Hood Conference 1983-2006
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District 4 Tualatin Yamhill Valley League 1959-1970
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District 4 Coast Valley League 1971-1979
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District 4 Willamette Valley League 1980-1986
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District 4 Three Rivers League 1987-2006 (see Dist 9)
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District 5 Midwetsern League 1959-2006
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District 6 Southern Oregon Conference 1959-2006
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District 7 Intermountain Conference 1959-2006
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District 8 Valley League 1959-2006
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District 9 Timber Valley League 1980-1982
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District 9 Three Rivers League 1983-1986 (see Dist 4)
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District 9 Pacific 7 1995-2006
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District 10 Portland Interscholastic League 1980-1982
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