In celebration of National Pi Day on March 14 (3/14) – a day in which math meets dessert - Instacart is serving up some delicious pie purchasing trends. Pulling on Instacart pie purchasing data, our 2025 National  Pi(e) Day Report explores the most popular pies across the nation, region, and even city-by-city:

America’s Favorite Pies: Apple Pie (#1) takes the crown, accounting for nearly a third (29%) of all pie sales, with Pumpkin Pie (#2) and Pecan Pie (#3), following closely behind. 

Regional Delights: West Coasters show a penchant for Pumpkin, the Midwest favors classic Cherry, the South opts for Pecan and the East Coast demonstrates the most diverse palates with Key Lime, Chocolate and Lemon Meringue emerging as most popular.

The Sweetest Day to Shop: Unsurprisingly, the day before Thanksgiving claims the title of the biggest pie-purchasing day of the year. However, Pi Day itself wasn’t far behind, with pie purchases on March 14 coming in at 60% higher than the yearly average.