Marnie is a moderately popular girls' name in England & Wales, ranking #114 in 2023 with 424 recorded births. The name reached its all-time peak in 2024 with 428 births ranking #113. Since 1996, the popularity has increased by 934.1%. In 2023, approximately 1 in every 605 girls born was named Marnie. STABLE Recent data shows the name is currently stable.