List of former Maryland state highways (2–199)

Maryland Route 17 was the designation for most of what is now MD 33 between Claiborne and Easton in western Talbot County. The state highway was one of the original state-numbered highways marked in 1927. MD 17 was replaced with MD 33 when the two highways swapped numbers in 1940. ==MD 20 (1927–1998)==

Maryland Route 20 was the designation for North Point Road, which originally ran from the tracks of an interurban near Fort Howard north through Edgemere and Dundalk in southeastern Baltimore County to US 40 in Baltimore. MD 20 was the main highway between Baltimore and Sparrows Point, which was accessed by MD 151 (Sparrows Point Road) from Edgemere. The interurban line connected Baltimore with Bay Shore Park, an amusement park that operated between 1906 and 1947 within what is now North Point State Park. As early as 1923 and late as 1928, a ferry connected Bay Shore Park with Rock Hall, thus briefly and indirectly connecting this MD 20 with the extant MD 20 in Kent County. The first section of MD 20 was constructed as a concrete road from Sparrows Point Road in Edgemere to Trappe Road at the hamlet of North Point in what is now Dundalk by 1921. The concrete road was extended from North Point to Baltimore in 1922 and 1923; those same years, a macadam road was built from Sparrows Point Road to the interurban tracks near Bay Shore Park. By 1934, MD 20 was proposed to be expanded from a width of to from Baltimore to MD 151 in Edgemere to serve the Sparrows Point industrial complex. In addition, MD 20 from MD 151 to the interurban near Bay Shore Park was proposed to be widened from to . The Edgemere portion of MD 20 was bypassed when a new four-lane divided highway—Sparrows Point Boulevard and North Point Boulevard—was completed from Sparrows Point to Wise Avenue in Dundalk in 1940 and 1941. Between 1942 and 1944, the remainder of North Point Boulevard was constructed from Wise Avenue to Baltimore as a wartime access project, including a cloverleaf interchange at MD 150. In addition, Erdman Avenue was extended as a four-lane divided highway to connect with North Point Boulevard, bypassing the segment of North Point Road between the boulevard and US 40 in the city of Baltimore. By 1946, MD 151 was applied to the four-lane divided highway connecting Baltimore with Sparrows Point, and MD 20 was assigned to four mainline segments and a spur of the old North Point Road: • MD 20B was the designation for the section of North Point Road from MD 151 and Cove Road in Dundalk northwest to a right-in/right-out interchange with eastbound MD 150 at the MD 150–MD 151 cloverleaf. The portion of MD 20 from near Fort Howard to Sparrows Point Road in Edgemere was resurfaced with bituminous concrete in 1969. • MD 20E was an unnamed spur from MD 20C to a dead end near MD 20C's northern end near Cove Road. The highway began as a loop ramp from southbound MD 151, crossed east over both directions of MD 151, and ended at MD 20D. What became MD 20F was constructed as one of several ramps built to connect MD 151 and MD 20 with the new Bethlehem Boulevard in 1957 and 1958. However, the road did not receive the MD 20F designation until 1976. MD 20F was replaced by an eastward extension of newly designated MD 158 (Bethlehem Boulevard) when Bethlehem Boulevard was transferred from Bethlehem Steel control to state maintenance through an October 17, 1989, road transfer agreement. Former MD 20F was destroyed by the reconstruction of I-695 and its junction with MD 151 and MD 158 completed in 1999. ==MD 27 (1927–1934)==

Maryland Route 27 was the designation for what became the original alignment of US 29 in Montgomery and Howard counties when the U.S. Highway was extended into Maryland in 1934. MD 27 roughly followed modern US 29 from the District of Columbia to White Oak, MD 650 from White Oak to Ashton, MD 108 from Ashton to the original village of Columbia, US 29 again and then Old Columbia Pike into Ellicott City. After US 29 was extended into Maryland, MD 27 was placed on most of its modern course from Germantown to Westminster, which had previously been MD 29. ==MD 29==

Maryland Route 29 was the original designation for modern MD 27 from US 240 (now MD 355) in Germantown north to US 140 (now Main Street) in Westminster in Montgomery County, Howard, Frederick, and Carroll counties. MD 29 was redesignated MD 27 after US 29 entered Maryland in 1934, replacing the original MD 27 from Silver Spring to Ellicott City. ==MD 33 (1927–1940)==

Maryland Route 33 was the designation for what is now MD 17 between Brunswick and Wolfsville in western Frederick County. The state highway was one of the original state-numbered highways marked in 1927. MD 33 was replaced with MD 17 when the two highways swapped numbers in 1940. ==MD 37 (1927–1935)==

Maryland Route 37 was the designation for what is now US 219 from the West Virginia state line near Redhouse north through Oakland to US 40 (now US 40 Alternate) at Keyser's Ridge in Garrett County. The state highway was one of the original state-numbered highways marked in 1927. MD 37 was replaced with a southern extension of US 219, which formerly ended at US 40 east of Grantsville, in 1935. ==MD 37 (1963–1998)==

Maryland Route 37 was the designation for a short stretch of McDonogh Road around its overpasses of Gwynns Falls, CSX's Hanover Subdivision, I-795, and the Baltimore Metro Subway near Garrison in western Baltimore County. The Maryland State Roads Commission relocated the road and built new bridges over Gwynns Falls and what was then the Western Maryland Railway between 1940 and 1942. The road was brought into the state highway system and designated MD 37 in 1963 and removed from the state highway system in 1998. ==MD 41 (1927–1956)==

Maryland Route 41 was the designation for the highway between US 219 in Oakland and MD 38 in Deer Park in southern Garrett County. The first segment of the highway was completed from Oakland to Mountain Lake Park by 1927. The final portion of MD 41 was completed in 1938. The state highway was replaced by MD 135 in 1956. ==MD 44==

Maryland Route 44 was the designation for the access road from MD 56 south to Fort Frederick State Park near Big Pool in western Washington County. The access road was designated MD 44 between 1946 and 1969. ==MD 46==

Maryland Route 46 is the former designation of the segment of I-195 between MD 295 and BWI Airport in Linthicum in northwestern Anne Arundel County. MD 46 was assigned when the connector between the Baltimore–Washington Expressway and the new Friendship International Airport opened in 1950. ==MD 48==

Maryland Route 48 was the designation for Pine Ridge Road from US 220 northeast to the Pennsylvania state line near Dickens in central Allegany County. The highway was constructed as a concrete road by 1927. MD 48 was removed from the state highway system in 1950. ==MD 52==

Maryland Route 52 was the designation for Williams Street and Williams Road from MD 51 in Cumberland east to Christie Road near Evitts Creek in central Allegany County. MD 52 began at MD 51, which followed Williams Street northwest toward downtown Cumberland and Louisiana Avenue south toward Oldtown. The highway was paved a concrete road from Cumberland to near Evitts Creek in 1923. MD 52 was extended east across Evitts Creek to Brashier Hollow Road by 1939. The highway was extended to Christie Road when the state rebuilt Williams Road between Brashier Hollow Road and Christie Road in 1952. MD 52 was removed from the state highway system in 1956. Part of MD 52's old course was brought back into the state highway system when MD 639 was extended south in 2008. ==MD 54 (1933–1956)==

Maryland Route 54 was the designation for the portion of Main Street north of MD 17 in the town of Myersville and Canada Hill Road from the Myersville town limit to the road's intersection with Easterday Road in western Frederick County. MD 54 was constructed as a concrete road in Myersville in 1933. The highway was extended north to Easterday Road by 1946. MD 54 was removed from the state highway system in 1956 immediately after the state resurfaced the route. ==MD 59==

Maryland Route 59 was the designation for Holter Road from US 340 in Jefferson north to MD 17 in Middletown in western Frederick County. Construction on the concrete highway began from the Middletown end and the first section was completed in 1929. A second segment of MD 59 was started in 1929 and completed in 1930. The third portion of the highway was started in 1930. MD 59 was extended south to Teen Barnes Road near Jefferson in 1933. The highway was proposed to extend to US 340 in 1933. However, MD 59 was not completed until the final stretch from Teen Barnes Road to US 340 was completed as a concrete road in 1938. MD 59 was removed from the state highway system in 1956. ==MD 61 (1927–1956)==

Maryland Route 61 was the designation for a section of Old Forge Road from Antietam Drive eastward near Hagerstown in northern Washington County. The highway was constructed by Washington County with state aid in 1916. MD 61 was removed from the state highway system in 1956; part of the route's former path is now occupied by a quarry. ==MD 69==

Maryland Route 69 was the designation for Jefferson Boulevard and Maryland Avenue from Mount Zion Road north to US 40 Alternate in Braddock Heights in western Frederick County. MD 69 was paved by Frederick County with state aid by 1911. The highway was removed from the state highway system in 1956. ==MD 70 (1927–1950)==

Maryland Route 70 was the designation for Knoxville Road from US 340 in Knoxville east to Brunswick in western Frederick County. MD 70 was constructed by 1927. The highway was replaced with a westward extension of MD 464 in 1950. MD 478 was assigned to Knoxville Road by 1971. ==MD 71 (1927–1956)==

Maryland Route 71 was the designation for what is now MD 194 from MD 26 in Ceresville to the Pennsylvania state line near Taneytown in Frederick and Carroll counties. Much of the highway was constructed in Frederick County by 1927. MD 71 was changed to MD 194 in 1956 to match Pennsylvania Route 194, taking its number from the original MD 194 and handing the number to much of what is now US 301. ==MD 71 (1956–1959)==

Maryland Route 71 was the designation for the Blue Star Memorial Highway from US 50 in Queenstown to the Delaware state line near Warwick. MD 71 was assigned to the highway when it was completed in 1956. ==MD 72==

Maryland Route 72 was the designation for Lewistown Road, Old Frederick Road, and Creagerstown Road from US 15 in Lewistown east and then north through Creagerstown to a point south of MD 77 near Loys Station between Thurmont and Rocky Ridge in northern Frederick County. MD 72 was constructed as a concrete road by Frederick County with state aid from Lewistown to Links Bridge Road south of Creagerstown between 1919 and 1921. The highway was extended as a concrete road to the south end of Creagerstown in 1925 and 1926 and through Creagerstown in 1926 and 1927. MD 72 was extended to its northern terminus south of Loys Station in 1932. All of MD 72 except the portion through Creagerstown that is now MD 550 was removed from the state highway system in 1956. ==MD 73==