The Airview Historic District is a district of 12 houses built between 1896 and 1930 on each side of East Main Street in Middletown, Maryland. The district was developed to take advantage of the Hagerstown and Frederick Railway, which paralleled what was then known as the National Pike, and is an example of a small-scale streetcar suburb. The subdivision was subdivided from the Kefauver farm and included a trolley stop in front of developer Lewis Kefauver's house. The trolley right-of-way is still visible in the deep setback between the street and the sidewalk in the front yards of houses on the north side of the street.