Marnie is a moderately popular girls' name in England & Wales, ranking #113 in 2024 with 428 recorded births. The name reached its all-time peak in 2024 with 428 births ranking #113. Since 1996, the popularity has increased by 943.9%. In 2024, approximately 1 in every 603 girls born was named Marnie. STABLE Recent data shows the name is currently stable.