Dundas is an unincorporated community in Lunenburg County, Virginia, United States. Dundas is located on Virginia State Route 137 in eastern Lunenburg County, 6.6 miles (10.6 km) east-southeast of Kenbridge. Dundas has a post office with ZIP code 23938, which opened on February 20, 1908. Dundas Ruritan Club is the home of the best sheep stew in the world. Dundas is known statewide for their stew. People from all over come down to Dundas to buy some.