Althea is a distinctive girls' name in England & Wales, ranking #1649 in 2018 with 18 recorded births. The name reached its all-time peak in 2021 with 30 births ranking #1128. Since 1996, the popularity has increased by 350.0%. In 2018, approximately 1 in every 16,015 girls born was named Althea. RISING Recent data shows the name is currently rising.