Dairy Barn
| Company type | Private |
|---|---|
| Industry | Convenience stores |
| Founded | 1961 |
| Founder | Dieter Cosman |
| Headquarters | Elwood, New York , United States |
Area served | Long Island, New York |
Key people | Dieter Cosman |
| Products | Dairy products, convenience store items |
Dairy Barn was a convenience store chain serving the Long Island area in New York, with its main office located at Oak Tree Farm Dairy in Elwood, New York. The stores were easily recognizable by their unique design, featuring dual-canopy drive-through lanes, a red barn-style exterior, and a small red silo structure.
At the height of its operations, Dairy Barn managed approximately 70 locations. These outlets functioned as distributors for Oak Tree products, offering Oak Tree branded milk and iced tea. Additionally, Dairy Barn marketed a variety of items under its own label, including butter, cream, eggs, bacon, sausage, ice cream, orange juice, and bottled water.
Several former Dairy Barn stores continue to operate today as retail establishments that maintain the original red barn-themed branding.
History
In 1941, Edgar Cosman, a Swiss textile entrepreneur, purchased Oak Tree Farm Dairy located in Elwood, Long Island, and appointed his son Dieter Cosman to oversee its operations. Under Dieter’s leadership, the business transitioned from maintaining a cow herd to focusing on processing milk procured from farms in upstate New York, which enhanced the company's profitability.
As home milk delivery waned, Cosman diversified into retail by inaugurating Dairy Barn drive-through convenience stores in 1961. Although these outlets sold Oak Tree’s dairy products, they operated as a distinct entity, both companies remaining under Cosman family ownership. The inaugural store launched on Larkfield Road in East Northport, followed shortly by another in Farmingdale. By 1967, Dairy Barn had expanded to 45 locations, increasing to 54 by 1972 and generating annual revenues of $20 million. In 1974, the chain pioneered a plastic milk container recycling initiative that collected over 461,000 pounds of material by 1977.
By the early 1990s, Oak Tree stood as Long Island’s only remaining dairy, transporting approximately 18,000 gallons of milk daily from farms near Syracuse. A devastating fire in 1997 destroyed the dairy facility; however, it was reconstructed by the following year. Dairy Barn sustained roughly 54 stores through the late 1990s and early 2000s before the number declined to 51 by 2005.
Beginning in 2009, the company began scaling back operations and divested numerous stores. By May 2010, several locations were transferred to Simi Enterprises and rebranded as The Barn. The Cosman family shuttered Oak Tree Farm and sold the property for development in 2012. At that time, there remained 19 Dairy Barn and 25 The Barn outlets. The Barn expanded to 22 stores by 2020 and experienced robust business throughout the COVID-19 pandemic.
In 2021, a lease agreement was established for 28 stores with Greek From Greece; this partnership concluded in 2022. Subsequently, The Barn operated only two sites in Huntington and St. James. By 2023, various independent operators managed former Dairy Barn locations under different brand names. In 2024, Ready Coffee acquired ten former Dairy Barn properties to grow its Long Island drive-thru coffee chain.