Maryland Route 765

Maryland Route 765 (MD 765) is a collection of state highways in the U.S. state of Maryland. These 26 highways are service roads constructed or old alignments maintained to provide access to private property or county highways whose access was compromised by the realignment of MD 2 and MD 4 in Calvert County. There are six signed mainline segments of MD 765 comprising the old alignment of the concurrency of MD 2 and MD 4 (hereafter referenced as MD 2-4) through Solomons, Lusby, St. Leonard, and Port Republic in southern Calvert County and in the county seat of Prince Frederick. There are also 20 unsigned sections of MD 765 south of Prince Frederick and along MD 2 between its junction with MD 4 in Sunderland and Owings in northern Calvert County.

The portions of MD 765 that form the old alignment of Solomons Island Road were constructed as part of the original state road constructed in the early 1910s that ran the length of Calvert County from Solomons to Owings and continued north toward Annapolis. The highway was designated MD 2 in the late 1920s and extensively improved in the late 1930s and 1940s. The first portion of MD 765 was designated in the early 1950s when MD 2's bypass of Prince Frederick opened. Further sections of MD 765 were assigned between Sunderland and Owings when MD 2 was reconstructed north of MD 4 in the mid-1960s. All but one of the remaining portions of MD 765 were assigned following the relocation of MD 2-4 through Port Republic and St. Leonard in the early 1980s and through Lusby to Solomons in the late 1980s.