Maryland Route 291 (MD 291) is a state highway in the U.S. state of Maryland. The highway runs 18.34 miles (29.52 km) from MD 20 in Chestertown east to the Delaware state line east of Millington, where the highway continues east as Delaware Route 6 (DE 6). MD 291 parallels the Chester River along the southern edge of Kent County and connects Chestertown with U.S. Route 301 (US 301). The highway follows much of what was originally MD 447, which was constructed between US 213 in Chestertown and MD 290 at Chesterville around 1930. MD 291 itself was built east of Millington around 1930. The highway was extended west toward Chesterville in the early 1930s, but it was not complete to MD 290 until the late 1940s. MD 291 was extended west to US 213 along a partially new alignment in the early 1960