Eiley first appears in the U.S. registration record in 2001. Its popularity climbed over the following decades. In 2024, 42 babies received the name (ranked #3652). Today it sits well outside the top 1,000 (around #4657), with roughly 30 babies named Eiley each year. Eiley's usage has held roughly steady recently. In total, around 508 babies have been registered with this name since 1880.