Thea is a moderately popular girls' name in United States, ranking #314 in 2021 with 1,033 recorded births. The name reached its all-time peak in 2018 with 1,208 births ranking #273. Since 1996, the popularity has increased by 964.9%. In 2021, approximately 1 in every 1,587 girls born was named Thea. FALLING Recent data shows the name is currently falling.