Louis R. Cappelli (b. 1951) is a real estate developer most active in Westchester County, New York. Cappelli has constructed, designed and developed more than twenty million square feet of mixed use, retail, residential, office, medical and parking facilities throughout the northeast, with a portfolio value exceeding $3 billion. His firm, Cappelli Enterprises, operates out of Valhalla, New York.

Many have credited Cappelli with single-handedly reviving the once struggling downtown districts of New Rochelle and White Plains with his targeted large scale mixed-use developments. Between 2001 and 2008, Cappelli developed White Plains City Center, Trump Plaza New Rochelle, The Ritz-Carlton Hotel in White Plains, The Residences at The Ritz-Carlton, Westchester, The Lofts at New Roc, Trump Parc Stamford, and Trump Park Residences in Yorktown. Cappelli Enterprises has also received approvals for The Ritz Carlton Hotel and Residences in Stamford, Connecticut as well for River Park Center, a 4 million square foot mixed use development in the heart of downtown Yonkers.

Cappelli's father, Luca Cappelli, founded the company's predecessor real estate and development businesses from scratch (portions of which were sold to Reckson Properties). Cappelli has two children. His son Bryan is a vice president within his organization and his daughter Caroline is attending college. He is married to the actress Kylie Travis.

Cappelli is the second largest stockholder in Empire Resorts which operates the Monticello Racetrack and racino. Cappelli is also currently in the process of building a casino on the site of the Concord Resort Hotel (estimated cost between $600 million and $700 million in Phase I, and over $1 billion it total). It is slated to be one of the largest development projects in the history of upstate New York.