- 1877–1878: Eight graduates of Xenia College form the Tuesday Club to discuss literature and write literary papers. They soon find the lack of a public library seriously hampers their efforts, and on August 20, 1878, they form the Young Women's Library Association to create one. The library opens in a room owned by Eli Millen on September 14, 1878, with donated books. By the end of the year, 137 people purchase tickets for $1 allowing them to use the library.
- 1899: The Xenia Board of Education takes over operation of the library, funding it so it is free to all.
- 1902–1906: Andrew Carnegie donates $20,000 to construct a new library building, and a second donation of $1,350 to purchase furniture for it. The Carnegie Library opens to the public on June 7, 1906.
- 1974: After the Xenia tornado, the library acquires land next to the Xenia City Building to construct a larger library.
- 1978: The library's new building opens, and remains in use today.