Leith first appears in the U.S. registration record in 1916. Its popularity climbed over the following decades. In 2018, 23 babies received the name (ranked #4431). Today it sits well outside the top 1,000 (around #6610), with roughly 14 babies named Leith each year. Leith's usage has held roughly steady recently. In total, around 759 babies have been registered with this name since 1880.