Apple's retail stores earn $6,050 per square foot, according to the latest data from RetailSails. In comparison, Tiffany & Co. is the second most profitable American retailer per square foot, earning $3,017.
Beyond Apple and Tiffany's, no retailer managed to top $2,000 per square foot, as the No. 3 chain lulu lemon athletic earned $1,936.
Apple also cracked the top 10 retailers with the highest overall sales per store. Apple came in at No. 9, behind wholesale retailers like Costco and Sam's Club, as well as Neiman Marcus and Walmart.
The data from RetailSales comes from an analysis of more than 200 American retailers spanning 15 sectors. Together, they operate more than 200,000 stores and generate more than $1.6 trillion in sales.
Apple has consistently been the top earner among U.S. retailers in sales per square foot. Data released earlier this year showed that Apple Stores earn 17 times more than the national average.