Western Oregon is a geographical term that is generally taken to mean the part of the U.S. state of Oregon within 120 miles of the state’s coastal region, on the west side of the crest of the Cascade Range. The term is applied somewhat loosely, however, and is sometimes taken to exclude the southwestern areas of the state, which are often referred to as So…Western Oregon is a geographical term that is generally taken to mean the part of the U.S. state of Oregon within 120 miles of the state’s coastal region, on the west side of the crest of the Cascade Range. The term is applied somewhat loosely, however, and is sometimes taken to exclude the southwestern areas of the state, which are often referred to as Southern Oregon. In that case, Western Oregon refers only to the counties west of the Cascades and north of and including Lane County.