Alpharetta Library Fulton County 238 Canton St, Alpharetta, GA30009 Alpharetta's 10,000-square-foot library branch is too small for the community it serves, so the days are numbered for…More the cramped building at the corner of Mayfield Rd and Canton St. Voters approved a bond to build new branches, including one for Alpharetta. But that doesn't stop its patrons from making it one of the busiest library branches in the entire Atlanta-Fulton Public Library system while they wait for the library system to pick a location and start building. Books, magazines, newspapers, movies and research tools are checked out regularly. Reading programs and art classes also are offered throughout the year.