Byrne Dairy is a regional dairy company headquartered in Syracuse, New York. It was founded during the Great Depression in 1933, delivering milk bottles to New Yorkers by horse-wagons. The company is privately run and has expanded, distributing across the Upstate New York region, supplying many wholesale and retail locations. The company also has a wholesale distribution center in Massachusetts and operates a chain of convenience store/gas stations in Central New York. To celebrate St. Patrick's Day, the company markets a green, mint-flavored milk from the end of February until March 17th.