West Alexander is a census-designated place in Donegal Township, Washington County, Pennsylvania, and formerly a borough in Washington County. Located less than a mile east of the border with West Virginia, the population was 604 at the 2010 census, just short of double the population of 320 recorded in the 2000 Census. The borough was dissolved into surrounding Donegal Township, effective January 1, 2009.

Interstate 70 (I-70) is a state highway that is located in the Commonwealth of Pennsylvania in the United States. It runs east to west across the southwest part of Pennsylvania and serves the southern fringe of the Pittsburgh metropolitan area.