Althea is a distinctive girls' name in England & Wales, ranking #1362 in 2025 with 23 recorded births. This places Althea in the top 18% of ranked UK girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2021 with 30 births ranking #1128. Since 1996, the popularity has increased by 475.0%. In 2025, approximately 1 in every 11,012 girls born was named Althea. RISING Recent data shows the name is currently rising.