The papers of Jacob Avshalomov consist of correspondence, clippings, programs, musical scores, certificates, memoir books, photographs, and publications relating mostly to his musical career, as well as those of his sons, David and Daniel, and his Russian-born father, Aaron. Also included are programs, reviews, and photographs of the Portland Junior Symphony (later the Portland Youth Philharmonic), which he led from 1954 to 1995.

Mary Evelene Calbreath (1895-1972) was a music teacher and composer in Portland, Oregon. Collection includes correspondence, musical programs, articles, genealogy, ephemera, daybook, landscape album, diaries, and score.

Collection consists of programs, 1918-1958, regarding the Eugene Gleemen, Lewis and Clark College, First Presbyterian Church and others. John Stark Evans was an organist and choirmaster at the First Presbyterian Church in Portland, Oregon, director of the Lewis and Clark College School of Music, and associate dean of music at the University of Oregon.

Frederick William Goodrich (1867-1942) was a composer, organist and choir director in Portland, Oregon. Collection consists of original scores and arrangements, primarily of religious music, as performed in Portland-area churches, circa 1895-1930; an unpublished history of the Portland Symphony Orchestra, 1899-1933; and reports regarding the Oregon Music Project, 1935-1942.

Materials relating to Irving Sklare, who ran the Remick Song Shop in Portland, Oregon. Included are correspondence with New York music publisher Jerome H. Remick; correspondence from the mid-1950s regarding the copyright of the song "Oregon my Oregon"; photographs of the Remick Song Shop; and music-related clippings and ephemera.

Scrapbooks, clippings, photographs, and memorabilia relating to the career of Julius Walter (1903-1971), a Portland, Oregon, musician who performed on local radio stations, including KOIN.

Harold A. Webber (1895-1949) was a Portland, Oregon, musician and children's orchestra leader. Collection is partially processed and includes correspondence, 1895-1934; newspaper clippings, 1909-1932; musical programs, songbooks, musical arrangements, ledgers, scrapbook, scores, and baton.