Delaware Route 37 (DE 37) is a state highway in New Castle County, Delaware. The route runs from Delaware Route 273 near Christiana northeast to U.S. Route 202 and Delaware Route 141 near the Wilmington Airport. The road runs through suburban neighborhoods before passing along the edge of Wilmington Airport, where it provides access to business parks. The Airport Road portion of DE 37 was originally a dirt road that was paved by 1942. DE 37 was assigned to its current alignment by 1985.