maryland route 366 (md 366) is a state highway in the u.s. state of maryland. known for much of its length as stockton road, the state highway runs from u.s. route 13 business in pocomoke city east to george island landing on chincoteague bay. md 366 is the main east–west highway of southern worcester county, connecting us 13 in pocomoke city with md 12 in stockton. the state highway was constructed starting in the mid-1910s from the pocomoke city end. md 366 was completed between pocomoke city and stockton in the early 1920s. the state highway was extended east to george island landing in the mid-1930s.