Dillion first appears in the U.S. registration record in 1979. Its popularity climbed over the following decades. In 1992, 354 babies received the name (ranked #539). Today it sits well outside the top 1,000 (around #4406), with roughly 24 babies named Dillion each year. Dillion's usage has held roughly steady recently. In total, around 3,644 babies have been registered with this name since 1880.