At the Oregon Historical Society. Holdings include rosters, minutes, roll books and other miscellaneous information concerning several G.A.R. posts in Oregon as well as G.A.R. Women's Relief Corp records.
1883 List of Pensioners on the Roll includes the name of each pensioner, the cause for which pensioned, the post office address, rate of pension per month, and the date of original allowance. This site is broken down by county.