William Benjamin Olds (1874–1948) was an American musician, professor, composer, and scholar. His book Bird songs for children was published in 1914. The Musical Quarterly published an article he wrote about bird songs in 1922. Arrangements he made of bird songs were performed.

He worked at Millikin College in Decatur, Illinois. He wrote a college song for the school in 1913. In 1923 he took a position at the University of Redlands in California. He studied bird songs. In Redlands he lived at the Herman A. Westbrook Residence at 805 North University Avenue.

The Choir of the West of Pacific Lutheran University utilized his arrangement for many years as an opener for concerts. The Wartburg Choir's performance of his arrangement Ein feste Burg ist unser Gott features in the documentary The Wartburg Choir in Germany: Celebrating 500 Years of Reformation.