Sarah Poage Caldwell Butler (August 21, 1892–December 2, 1983) was a librarian and civic leader known for her work in establishing a public library in Roanoke, Virginia.

The city agreed with the plan but required the organization to raise $30,000 to provide the books and library furnishings.

[4] Later that same year, working with civic leaders Lucy Addison, Dr. Arthur L. James, and Dr. L. Downing, Butler helped the library open a branch in the Gainsboro community for Roanoke's Black citizens who had also been part of the fundraising campaign for the library.

Butler held many leadership roles in the Garden Club, ultimately serving as its president from 1950 to 1952.

The wedding announcement called her "one of the most popular and interesting girls of Roanoke's youngest set.