The Southern Maryland Wine Growers Cooperative
About Port of Leonardtown Winery
Founded in 2010, Port of Leonardtown Winery is proud to be one of Maryland’s most unique and community-driven wineries— and one of only cooperatives in Maryland.
At the heart of the winery is the Southern Maryland Wine Growers Cooperative, a dedicated group of local farmers who came together with a shared vision: to make grape growing and winemaking more accessible, sustainable, and rewarding for the region. By sharing resources, equipment, and expertise, the cooperative allows members to grow high-quality grapes and craft wines under a single label—something that wouldn’t be possible alone.
Our story begins in the early-2000s, when many Southern Maryland farmers began transitioning away from tobacco. With support from St. Mary’s County and the State of Maryland, these farmers planted new roots—literally—by embracing viticulture. What started as an ambitious idea quickly grew into a thriving wine community.
Today, the cooperative includes 7 member vineyards across St. Mary’s, Calvert, and Charles Counties, with nearly 40 acres of grapes and more than 20 different varieties. This diversity allows us to create a wide range of wines that truly reflect the character and potential of Maryland-grown fruit.
Each year, we produce approximately 5,000 cases of wine, with a strong commitment to using 100% Maryland-grown grapes. Our varietals include favorites like Chardonnay, Albariño, Viognier, Sauvignon Blanc, Vidal, Chambourcin, Cabernet Franc, Barbera, Merlot, Petit Verdot and many more.
The Cooperative
Formed in 2007, the Southern Maryland Wine Growers Cooperative was the first agricultural cooperative of its kind in Maryland. It was built on a simple but powerful idea: that collaboration can create opportunity.
With the support of local and state partners, the cooperative has helped preserve farmland, support local families, and build a vibrant wine and tourism industry in Southern Maryland. It’s not just about making wine—it’s about keeping agriculture alive and thriving in our community.
The Winery & Winemaking
Located in the heart of Leonardtown, our winery operates out of a thoughtfully repurposed historic building, making it the first commercial winery in St. Mary's County. Since opening, we’ve proudly earned over 150 awards, including multiple Best in Show honors and international recognition.
Under the guidance of Winemaker Lauren Zimmerman & General Manager Michael Hughes, our wines reflect both craftsmanship and creativity. Working with such a wide variety of grapes presents its challenges—but it’s also what makes our wines so unique and special. A true representation of flavors across Maryland.
