Thia first appears in the U.S. registration record in 1962. Its popularity climbed over the following decades. In 2019, 17 babies received the name (ranked #6989). Today it sits well outside the top 1,000 (around #9996), with roughly 12 babies named Thia each year. Thia's usage has held roughly steady recently. In total, around 331 babies have been registered with this name since 1880.