Maryland Route 440 (MD 440) is a state highway in the U.S. state of Maryland. Known as Dublin Road, the state highway runs 5.65 miles (9.09 km) from MD 543 in east to U.S. Route 1 (US 1) near Dublin. MD 440 was built between Ady and MD 136 in Dublin in the early 1930s and extended east to US 1 in 1956.