# List of state routes in Maine

State routes in Maine are highways within the Maine State Highway System that are signed and maintained by the Maine Department of Transportation, and not U.S. Routes or routes of the Interstate Highway System. Some parts of these roads are maintained by local government authorities. There are over 100 State routes.
Note about termini: In several cases there is disagreement between the administrative termini of a route (which are defined by MaineDOT) and the termini signed in the field. All termini listed on this page are administrative termini; discrepancies are listed on the respective pages.

## Primary and secondary routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| SR 1 | 9.0 | 14.5 | US 1 / SR 103 in Kittery | US 1A in York | 01936-01-011936 | 01940-01-011940 | Became part of SR 103 after US 1 was designated |
| SR 1 | 20.0 | 32.2 | US 1 / SR 9 in Wells | US 1 / SR 9 in Biddeford | 01940-01-011940 | 01949-01-011949 | Proposed alternate for US 1 but was never approved by AASHTO. It was cosigned with SR 9 for its entire length. |
| SR 2 | 46.0 | 74.0 | US 2 in Macwahoc | US 2 in Houlton | 01939-01-011939 | 01939-01-011939 | Shown on the 1939 map and 1939 route log, even though US 2A already existed by then |
| SR 3 | 120.67 | 194.20 | SR 8 / SR 11 / SR 27 in Augusta | SR 102 / SR 198 in Mount Desert | 01940-01-011940 | current | |
| SR 4 | 168.85 | 271.74 | NH 4 in Rollinsford, NH | Haines Landing in Rangeley | 01931-01-011931 | current | |
| SR 5 | 118.54 | 190.77 | SR 9 in Old Orchard Beach | SR 120 in Andover | 01933-01-01c. 1933 | current | |
| SR 6 | — | — | US 1 | Old Orchard Beach | 01937-01-011937 | 01946-01-01c. 1946 | Renumbered to SR 98 |
| SR 6 | 207.23 | 333.50 | Route 173 / US 201 near Saint-Théophile, QC (Armstrong–Jackman Border Crossing) | Route 4 near Saint Croix, NB (Saint Croix–Vanceboro Bridge) | 01949-01-011949 | current | Only route with both termini at the Canada–US border |
| SR 7 | 61.90 | 99.62 | US 1 / SR 3 / SR 137 in Belfast | SR 15 in Dover-Foxcroft | 01933-01-01c. 1933 | current | |
| SR 8 | 51.60 | 83.04 | US 201 / SR 11 / SR 17 / SR 27 / SR 100 in Augusta | US 201 / US 201A in Solon | 01954-01-01c. 1954 | current |
| SR 9 | 289.09 | 465.25 | NH 9 / NH 236 in Somersworth, NH | Ferry Point International Bridge to St. Stephen, NB | 01933-01-01c. 1933 | current | |
| SR 10 | 9.28 | 14.93 | US 1 in Presque Isle | US 1A in Easton | 01940-01-011940 | current | Formerly US 1 |
| SR 11 | 400.93 | 645.23 | US 202 / NH 11 in Rochester, NH | US 1 / SR 161 in Fort Kent | 01926-01-011926 | current | Longest state highway in Maine, state highway designation for former New England Route 11, extended to modern length in 1933-1934 |
| SR 15 | 180.12 | 289.88 | Main / West Main / School Streets in Stonington | US 201 / SR 6 in Jackman | 01933-01-011933 | current | |
| SR 16 | 189.78 | 305.42 | NH 16 in Wentworth Location, NH | US 2 in Orono | 01933-01-01c. 1933 | current | |
| SR 17 | 130.70 | 210.34 | SR 4 in Rangeley | US 1 / US 1A in Rockland | 01933-01-01c. 1933 | current | |
| SR 18 | 54.15 | 87.15 | NH 18 in Conway (now US 302) | US 1 in Portland (now SR 77) | 01926-01-011926 | 01935-01-011935 | State highway designation for former New England Route 18, redesignated US 302 in 1935 |
| SR 22 | 19.48 | 31.35 | SR 35 in Buxton | SR 25 / SR 77 in Portland | 01939-01-011939 | current | |
| SR 23 | 68.53 | 110.29 | SR 8 / SR 11 / SR 17 in Sidney | SR 6 / SR 15 / SR 16 in Guilford | 01954-01-011954 | current | Originally part of a much longer SR 24 |
| SR 24 | 43.99 | 70.80 | Baileys Island Road in Harpswell | US 201 / SR 9 / SR 27 / SR 126 in Gardiner | 01933-01-01c. 1933 | current | |
| SR 25 | 42.38 | 68.20 | NH 25 near Freedom, NH | SR 22 / SR 77 in Portland | 01926-01-011926 | current | State highway designation for former New England Route 25 designated in 1925 |
| SR 26 | 95.91 | 154.35 | SR 77 in Portland | NH 26 in Cambridge, NH | 01926-01-011926 | current | State highway designation for former New England Route 26 designated in 1925 |
| SR 27 | 154.10 | 248.00 | SR 238 in Southport | Route 161 near Saint-Augustin-de-Woburn, QC Coburn Gore–Woburn Border Crossing) | 01933-01-011933 | current | |
| SR 32 | 58.62 | 94.34 | SR 130 in Bristol | US 201 / SR 100 / SR 137 Business in Winslow | 01933-01-011933 | current | |
| SR 35 | 90.90 | 146.29 | SR 9 / SR 9A in Kennebunk | US 2 / SR 5 in Bethel | 01933-01-01c. 1933 | current | |
| SR 37 | 9.25 | 14.89 | SR 117 in Bridgton | SR 118 in Waterford | 01937-01-01c. 1937 | current | |
| SR 41 | 12.6 | 20.3 | SR 41 in New Sharon | SR 43 in Starks | 01939-01-01c. 1939 | 01946-01-011946 | renumbered as SR 134; former SR 134 renumbered as SR 41 |
| SR 41 | 26.88 | 43.26 | US 202 / SR 11 / SR 100 / SR 133 in Winthrop | US 2 / SR 27 / SR 156 in Farmington | 01946-01-01c. 1946 | current | Current SR 41 was originally designated SR 134 in 1928; designations were swapped in 1946-7 |
| SR 43 | 102.71 | 165.30 | Temple / Intervale / Cummings Hill Roads in Temple | US 2 / US 2A in Old Town | 01933-01-01c. 1933 | current | |
| SR 46 | 18.65 | 30.01 | US 1 in Orland | SR 9 in Eddington | 01960-01-011960 | current | Formerly part of SR 175 |
| SR 50 | 0.9 | 1.4 | I-95 in Orono | US 2A in Old Town | 01960-01-01c. 1960 | current | Unmarked internal designation for Stillwater Avenue at least from I-95 Exit 193 to US 2A |
| SR 52 | 17.19 | 27.66 | US 1 in Camden | US 1 in Belfast | 01960-01-011960 | current | Formerly part of SR 137 |
| SR 69 | 34.62 | 55.72 | SR 11 / SR 100 in Pittsfield | US 1A / SR 139 in Winterport | 01959-01-011959 | current | |
| SR 73 | 10.68 | 17.19 | SR 131 in St. George | US 1 in Rockland | 01963-01-011963 | current | |
| SR 77 | 12.32 | 19.83 | SR 207 in Scarborough | SR 22 / SR 25 in Portland | 01939-01-011939 | current | |
| SR 85 | 7.91 | 12.73 | US 302 / SR 35 in Raymond | SR 11 in Casco | 01948-01-011948 | current | |
| SR 86 | 10.32 | 16.61 | SR 191 near East Machias | US 1 in Dennysville | 01962-01-011962 | current | |
| SR 88 | 8.41 | 13.53 | US 1 in Falmouth | US 1 in Falmouth | 01946-01-01c. 1946 | current | Formerly US 1 |
| SR 89 | 10.89 | 17.53 | SR 161B / SR 164 in Caribou | US 1A in Limestone | 01946-01-01c. 1946 | current | |
| SR 90 | 10.83 | 17.43 | US 1 in Warren | US 1 in Rockport | 01946-01-01c. 1946 | current | |
| SR 91 | 7.83 | 12.60 | US 1 in York | SR 236 in South Berwick | 01949-01-011949 | current | |
| SR 92 | 4.19 | 6.74 | US 1 in Machias | Old County Road in Machiasport | 01939-01-011939 | current | |
| SR 93 | 11.01 | 17.72 | US 302 in Bridgton | SR 5 in Lovell | 01953-01-011953 | current | |
| SR 94 | 13.35 | 21.48 | SR 7 in Dexter | SR 11 / SR 43 in Corinth | 01948-01-011948 | current | |
| SR 95 | 8.18 | 13.16 | SR 25 in Gorham | SR 35 in Standish | 01946-01-01c. 1946 | 01957-01-011957 | Renumbered SR 237 after the designation of I-95 |
| SR 96 | 5.77 | 9.29 | SR 27 in Boothbay Harbor | Middle Road in Boothbay | 01948-01-011948 | current | |
| SR 97 | 9.53 | 15.34 | SR 220 in Friendship | US 1 in Warren | 01949-01-011949 | current | Formerly SR 220 |
| SR 98 | 2.81 | 4.52 | US 1 in Saco | SR 5 in Old Orchard Beach | 01946-01-01c. 1946 | current | |
| SR 99 | 8.76 | 14.10 | SR 109 in Sanford | US 1 / SR 9A in Kennebunk | 01940-01-01c. 1940 | current | |
| SR 100 | 139.7 | 224.8 | Cumberland Avenue in Portland | US 2 in Bangor | 01925-01-011925 | current | First numbered state highway in Maine. Removed after statewide renumbering in 1926, then put back onto most of original routing in 1935. Old route from Augusta to Waterville now SR 11; section north of Newport now SR 7, SR 6/SR 16, SR 155, and SR 188. |
| SR 101 | — | — | US 201 in Augusta | US 1 / US 1A in Rockland | 01925-01-011925 | 01933-01-01c. 1933 | Became part of SR 17 |
| SR 101 | 8.22 | 13.23 | US 1 in Kittery | Gulf Road in Dover, NH | 01940-01-01c. 1940 | current | |
| SR 102 | 12.99 | 20.91 | SR 102A in Tremont | SR 3 / SR 198 in Bar Harbor | 01931-01-011931 | current | Original 1925 route is now part of SR 3; the modern alignment was first designated in 1931 |
| SR 103 | 16.33 | 26.28 | SR 236 in Eliot | US 1A in York | 01929-01-01c. 1929 | current | |
| SR 104 | — | — | US 2 in Newport | Greenville Junction | 01925-01-011925 | 01931-01-01c. 1931 | Became part of SR 100 and SR 105 (Now SR 7, SR 15, and SR 16) |
| SR 104 | 34.7 | 55.8 | SR 8 / SR 11 / SR 27 in Augusta | US 2 / US 201 / US 201A in Skowhegan | 01931-01-011931 | current | |
| SR 105 | — | — | US 1A in Bangor | Greenville Junction | 01925-01-011925 | 01933-01-01c. 1933 | Became part of SR 15 |
| SR 105 | 48.11 | 77.43 | US 201 / US 202 / SR 9 / SR 17 / SR 100 in Augusta | US 1 in Camden | 01933-01-01c. 1933 | current | |
| SR 106 | — | — | US 1A in Brewer | SR 3 in Ellsworth | 01925-01-011925 | 01933-01-01c. 1933 | Became part of SR 15 |
| SR 106 | 14.15 | 22.77 | US 202 / SR 11 / SR 100 in Leeds | SR 133 in Livermore Falls | 01937-01-01c. 1937 | current | |
| SR 107 | — | — | SR 100 (now also US 202) in Auburn | Haines Landing | 01925-01-011925 | 01933-01-01c. 1933 | Section east of Rangeley became part of SR 4 in 1931; remainder became part of SR 16 until 1951, when it too became part of SR 4. |
| SR 107 | 16.22 | 26.10 | SR 11 / SR 113 in Baldwin | SR 117 in Bridgton | 01936-01-011936 | current | |
| SR 108 | 26.69 | 42.95 | US 2 in Rumford | SR 219 in Turner | 01925-01-011925 | current | Current western alignment was first designated in 1929 |
| SR 109 | 26.16 | 42.10 | US 1 / SR 9 in Wells | NH 109 in Wakefield, NH | 01925-01-011925 | current | |
| SR 110 | 3.60 | 5.79 | Stevens Corner Road to NH 153 in Wakefield, NH | SR 11 in Newfield | 01925-01-011925 | current | In 1931, the section from Alfred to East Waterboro became part of SR 4 (now US 202) and the former section between Limerick and Waterboro became part of former SR 205 (now SR 5), and SR 110 was extended west to the New Hampshire border in Newfield. Most of the remaining length became part of SR 11 in 1933. |
| SR 111 | — | — | SR 110 (now US 202) in East Waterboro | SR 25 in Gorham | 01925-01-011925 | 01931-01-01c. 1931 | Became part of SR 4 |
| SR 111 | 13.88 | 22.34 | US 202 / SR 4 / SR 4A in Alfred | SR 9 / SR 208 in Biddeford | 01933-01-01c. 1933 | current | Section from Alfred to US 1 in Biddeford was formerly SR 11 and originally part of New England Route 11 in 1925. |
| SR 112 | 25.9 | 41.7 | US 1 / SR 5 / SR 9 in Saco | SR 114 in Gorham | 01925-01-011925 | current | |
| SR 113 | 54.81 | 88.21 | SR 25 in Standish | US 2 in Gilead | 01925-01-011925 | current | 6.0 miles (9.7 km) of the route run within New Hampshire. NH 113B is a loop of SR 113. |
| SR 114 | 35.04 | 56.39 | US 1 / SR 9 / SR 207 in Scarborough | US 302 / SR 11 in Naples | 01925-01-011925 | current | The section north of Scarborough was part of SR 207; the original section from there became part of SR 35 and SR 95 (now SR 237) |
| SR 115 | 18.04 | 29.03 | US 302 / SR 35 in Windham | SR 88 in Yarmouth | 01925-01-011925 | current | originally went on what is now US 202 (then SR 4) south of West Gray |
| SR 116 | — | — | SR 18 (now US 302) in Naples | SR 121 in Mechanic Falls | 01925-01-011925 | 01933-01-01c. 1933 | became part of SR 11 |
| SR 116 | 56.42 | 90.80 | SR 16 in Old Town | SR 11 / SR 157 in Medway | 01933-01-01c. 1933 | current | |
| SR 117 | 88.16 | 141.88 | SR 112 in Saco | SR 219 in Turner | 01925-01-011925 | current | |
| SR 118 | 13.04 | 20.99 | SR 35 in Waterford | SR 117 / Main Street in Norway | 01925-01-011925 | current | section north of North Waterford became SR 35 / SR 5; this alignment has since been bypassed |
| SR 119 | — | — | SR 117 in Harrison | SR 118 in Waterford | 01925-01-011925 | 01933-01-011933 | Became part of SR 35 |
| SR 119 | 15.2 | 24.5 | SR 11 / SR 121 in Minot | SR 26 / SR 117 in Paris | 01935-01-011935 | current | |
| SR 120 | 15.18 | 24.43 | SR 5 in Andover | US 2 in Rumford | 01925-01-011925 | current | |
| SR 121 | 35.76 | 57.55 | US 302 / SR 35 in Raymond | US 202 / SR 4 / SR 11 / SR 100 in Auburn | 01925-01-011925 | current | |
| SR 122 | 5.11 | 8.22 | SR 26 in Poland | US 202 / SR 4 / SR 100 in Auburn | 01925-01-011925 | current | |
| SR 123 | 13.66 | 21.98 | Hurricane Ridge Road in Harpswell | SR 24 in Brunswick | 01925-01-011925 | current | |
| SR 124 | — | — | Bailey's Island | US 1 in Brunswick | 01925-01-011925 | 01933-01-01c. 1933 | Became part of SR 24 |
| SR 124 | 12.47 | 20.07 | SR 11 / SR 121 in Mechanic Falls | SR 117 in Buckfield | 01933-01-01c. 1933 | current | |
| SR 125 | 22.12 | 35.60 | US 1 / SR 136 in Freeport | SR 24 in Bowdoinham | 01925-01-011925 | current | |
| SR 126 | 48.78 | 78.50 | US 202 / SR 100 in Lewiston | SR 220 in Washington | 01925-01-011925 | current | |
| SR 127 | — | — | U.S. Route 201 in Gardiner | US 1 in Wiscasset | 01925-01-011925 | 01933-01-01c. 1933 | Became part of SR 27 |
| SR 127 | 25.64 | 41.26 | Seguinland Road in Georgetown | SR 27 / SR 197 in Dresden | 01933-01-01c. 1933 | current | |
| SR 128 | — | — | US 1 in Wiscasset | Boothbay Harbor | 01925-01-011925 | 01933-01-01c. 1933 | Became part of SR 27 |
| SR 128 | 15.36 | 24.72 | SR 127 in Woolwich | SR 27 in Dresden | 01933-01-01c. 1933 | current | |
| SR 129 | 13.36 | 21.50 | Middle Road in South Bristol | US 1 Bus. / SR 130 in Damariscotta | 01925-01-011925 | current | |
| SR 130 | 14.41 | 23.19 | Pemaquid Loop Road in Bristol | US 1 Bus. / SR 129 in Damariscotta | 01925-01-011925 | current | |
| SR 131 | 58.63 | 94.36 | Drift Inn / Glenmere Roads in St. George | SR 141 in Swanville | 01925-01-011925 | current | |
| SR 132 | — | — | SR 101 (now SR 17) in Jefferson | US 1 in Waldoboro | 01925-01-011925 | 01933-01-01c. 1933 | Became part of SR 32 |
| SR 132 | 10.8 | 17.4 | SR 9 / SR 126 in Sabattus | US 202 / SR 11 / SR 100 in Monmouth | 01937-01-01c. 1937 | current | |
| SR 133 | 31.78 | 51.14 | US 202 / SR 11 / SR 41 / SR 100 in Winthrop | US 2 / SR 4 in Farmington | 01925-01-011925 | current | |
| SR 134 | 26.96 | 43.39 | US 202 / SR 11 / SR 100 / SR 133 in Winthrop | US 2 / SR 27 / SR 156 in Farmington | 01925-01-011925 | 01946-01-01c. 1946 | Renumbered as SR 41; old SR 41 renumbered as SR 134 |
| SR 134 | 12.6 | 20.3 | SR 41 in New Sharon | SR 43 in Starks | 01946-01-01c. 1946 | current | |
| SR 135 | 23.48 | 37.79 | SR 132 in Monmouth | SR 8 / SR 11 in Belgrade | 01925-01-011925 | current | |
| SR 136 | 23.48 | 37.79 | SR 100 (now SR 11) in Oakland | US 2 in Norridgewock | 01925-01-011925 | 01933-01-01c. 1933 | became part of SR 137 |
| SR 136 | 19.17 | 30.85 | US 1 / SR 125 in Freeport | US 202 / SR 11 / SR 100 in Auburn | 01933-01-01c. 1933 | current | |
| SR 137 | 56.25 | 90.53 | US 2 in Mercer | US 1 / SR 3 / SR 7 in Belfast | 01925-01-011925 | current | |
| SR 138 | — | — | US 201 in Augusta | US 1 in Hampden | 01925-01-011925 | 01933-01-01c. 1933 | became part of SR 9 (now also US 202) |
| SR 138 | 9.53 | 15.34 | US 201 in Bowdoin | US 201 in Richmond | 01946-01-01c. 1946 | current | Originally designated SR 201 in 1937; renumbered in 1946-7 |
| SR 139 | 58.83 | 94.68 | US 2 / US 201A / SR 8 in Norridgewock | US 1A / SR 69 in Winterport | 01925-01-011925 | current | |
| SR 140 | — | — | SR 100 (now SR 8/ SR 11) in Belgrade | US 2 in New Sharon | 01925-01-011925 | 01933-01-01c. 1933 | became part of SR 27 |
| SR 140 | 22.4 | 36.0 | SR 117 in Buckfield | SR 4 / SR 17 in Jay | 01933-01-01c. 1933 | current | |
| SR 141 | 13.22 | 21.28 | US 1 / SR 3 in Belfast | SR 139 in Monroe | 01925-01-011925 | current | |
| SR 142 | 43.29 | 69.67 | US 2 / SR 17 in Dixfield | SR 16 / SR 27 in Kingfield | 01925-01-011925 | current | |
| SR 143 | — | — | SR 107 (now SR 4/ SR 27) in Fairbanks | Eustis | 01925-01-011925 | 01933-01-01c. 1933 | outside Eustis became part of SR 4 in 1931; remainder became part of SR 27 |
| SR 143 | 15.25 | 24.54 | US 202 / SR 9 in Dixmont | SR 222 in Stetson | 01937-01-01c. 1937 | current | |
| SR 144 | — | — | SR 107 (now SR 4) in Rangeley | US 201 (now US 201A) in North Anson | 01925-01-011925 | 01933-01-01c. 1933 | Became part of SR 16 |
| SR 144 | — | — | SR 16 in Oquossoc | Haines Landing | 01937-01-011937 | 01951-01-01c. 1951 | Became part of SR 4 |
| SR 144 | 8.42 | 13.55 | West Shore Road in Westport | US 1 in Wiscasset | 01954-01-011954 | current | |
| SR 145 | 10.15 | 16.33 | SR 4 in Strong | SR 142 near Kingfield | 01925-01-011925 | current | |
| SR 146 | 6.33 | 10.19 | SR 27 in New Portland | SR 16 in New Portland | 01925-01-011925 | current | |
| SR 147 | 15.0 | 24.1 | US 2 / US 201 in Skowhegan | US 201 in Solon | 01925-01-011925 | 01954-01-011954 | Redesignated US 201 after the designation of US 201A in 1954 |
| SR 148 | 19.22 | 30.93 | SR 43 in Industry | US 201 in Madison | 01925-01-011925 | current | Western segment formerly SR 43A |
| SR 149 | — | — | US 201 in Bingham | US 201 in Abbot | 01925-01-011925 | 01933-01-011933 | Became part of SR 16 |
| SR 149 | — | — | SR 27 north of Eustis | SR 16 (now submerged) in Flagstaff | 01933-01-011933 | 01949-01-011949 | Cancelled and road partially submerged when the Flagstaff Dam and Flagstaff Lake were constructed |
| SR 149 | 16.08 | 25.88 | SR 4 in Strong | SR 142 in Phillips | 01951-01-011951 | current | |
| SR 150 | 50.81 | 81.77 | US 2 in Skowhegan | Sebec Lake in Willimantic | 01925-01-011925 | current | |
| SR 151 | 30.45 | 49.00 | US 2 in Palmyra | SR 16 near Wellington | 01925-01-011925 | current | |
| SR 152 | 20.31 | 32.69 | SR 11 / SR 100 in Pittsfield | SR 150 in Cambridge | 01925-01-011925 | current | |
| SR 153 | — | — | SR 152 north of St. Albans | SR 100 (now SR 7) in Dexter | 01925-01-011925 | 01933-01-011933 | Became part of SR 24 (this section now part of SR 23) |
| SR 153 | 4.66 | 7.50 | SR 6 / SR 16 in Dover-Foxcroft | Greeley's Landing in Dover-Foxcroft | 01933-01-01c. 1933 | current | |
| SR 154 | — | — | SR 104 (now SR 6 / SR 16 and SR 15) in Dover-Foxcroft | US 2 in West Enfield | 01925-01-011925 | 01931-01-011931 | Became part of SR 100 (now also part of SR 6) |
| SR 154 | 20.21 | 32.52 | SR 151 near Wellington | SR 23 in Ripley | 01933-01-01c. 1933 | current | |
| SR 155 | — | — | SR 6 in LaGrange | US 2 in Orono | 01925-01-011925 | 01955-01-011955 | Became part of SR 16; number reused on intersecting route |
| SR 155 | 34.41 | 55.38 | SR 11 / SR 221 in Bradford | US 2 / SR 6 in Lincoln | 01955-01-011955 | current | |
| SR 156 | — | — | SR 155 in LaGrange | US 2 in West Enfield | 01925-01-011925 | 01929-01-011929 | Became part of SR 154 (later SR 100, now SR 6/SR 155) |
| SR 156 | 23.16 | 37.27 | SR 142 in Weld | SR 41 in Chesterville | 01929-01-011929 | current | |
| SR 157 | 22.46 | 36.15 | SR 11 in Millinocket | US 2 in Mattawamkeag | 01925-01-011925 | current | |
| SR 158 | 4.42 | 7.11 | SR 11 in Sherman | US 2 in Sherman | 01925-01-011925 | current | |
| SR 159 | 20.68 | 33.28 | Shin Pond Village in Mt. Chase | US 2 in Island Falls | 01925-01-011925 | current | |
| SR 160 | — | — | SR 5 in Limerick | US 1 in Fort Kent | 01925-01-011925 | 01933-01-011933 | became part of SR 161 |
| SR 160 | 32.64 | 52.53 | SR 5 in Limerick | SR 117 in Denmark | 01933-01-011933 | current | |
| SR 161 | 83.03 | 133.62 | Route 190 in Carlingford, NB (Fort Fairfield–Andover Border Crossing) | Frank Mack Road in Allagash | 01925-01-011925 | current | |
| SR 162 | 16.97 | 27.31 | SR 161 near St. Agatha | US 1 in Frenchville | 01925-01-011925 | current | |
| SR 163 | 29.22 | 47.03 | SR 11 in Ashland | SR 167 in Presque Isle | 01925-01-011925 | current | |
| SR 164 | 23.63 | 38.03 | US 1 in Presque Isle | US 1 in Caribou | 01925-01-011925 | current | |
| SR 165 | — | — | US 1 in Easton | US 1A in Fort Fairfield | 01925-01-011925 | 01983-01-011983 | Redesignated US 1A in 1983 |
| SR 166 | 46.0 | 74.0 | US 2 in Macwahoc | US 2 in Macwahoc | 01925-01-011925 | 01936-01-011936 | Redesignated US 2A in 1936 |
| SR 166 | 7.34 | 11.81 | Main Street in Castine | SR 175 in Penobscot | 01940-01-01c. 1940 | current | Originally designated SR 202 in 1925; renumbered SR 166E in 1939, then SR 166 in 1940-1 |
| SR 167 | — | — | US 2 in Lincoln | Canada border in Vanceboro | 01925-01-011925 | 01933-01-011933 | Became part of SR 16 (now SR 6) |
| SR 167 | 12.98 | 20.89 | US 1 in Presque Isle | US 1A in Fort Fairfield | 01936-01-011936 | current | |
| SR 168 | 10.18 | 16.38 | SR 6 in Lee | US 2 in Winn | 01925-01-011925 | current | |
| SR 169 | 24.22 | 38.98 | SR 6 / SR 170 in Springfield | US 1 in Danforth | 01925-01-011925 | current | |
| SR 170 | 20.37 | 32.78 | SR 6 / SR 169 in Springfield | US 2 in Macwahoc | 01925-01-011925 | current | |
| SR 171 | 17.83 | 28.69 | SR 169 in Prentiss | US 2A in Reed Plantation | 01925-01-011925 | current | |
| SR 172 | — | — | US 2 in West Enfield | Grand Falls Road east of Burlington | 01925-01-011925 | 01931-01-011931 | Became part of SR 100 (now SR 188 and SR 155) |
| SR 172 | 22.66 | 36.47 | SR 175 in Sedgwick | US 1 / SR 3 in Ellsworth | 01933-01-01c. 1933 | current | |
| SR 173 | — | — | US 2 in West Enfield | SR 11 (now SR 155 near Enfield | 01925-01-011925 | 01951-01-011951 | Became part of SR 188 |
| SR 173 | 21.03 | 33.84 | US 1 in Lincolnville | SR 220 in Liberty | 01953-01-011953 | current | |
| SR 174 | — | — | SR 106 (now SR 15) in East Orland | SR 106 (now SR 172) in Ellsworth | 01925-01-011925 | 01931-01-011931 | Became part of SR 102; this section became part of SR 3 in 1933, and is now part of US 1 |
| SR 174 | 3.8 | 6.1 | US 1A in Prospect | US 1 / SR 3 in Prospect | 01931-01-011931 | current | |
| SR 175 | 46.16 | 74.29 | SR 15 / SR 172 / SR 176 in Blue Hill | US 1 / SR 3 / SR 15 in Orland | 01925-01-011925 | current | |
| SR 176 | 38.27 | 61.59 | SR 175 in Brooksville | US 1 / SR 3 in Orland | 01925-01-011925 | current | |
| SR 177 | 6.98 | 11.23 | SR 175 in Penobscot | SR 15 / SR 172 / SR 176 in Blue Hill | 01925-01-011925 | current | |
| SR 178 | 13.27 | 21.36 | State Street / SR 9 in Brewer | US 2 in Milford | 01925-01-011925 | current | |
| SR 179 | 22.34 | 35.95 | US 1A in Ellsworth | SR 9 in Aurora | 01925-01-011925 | current | |
| SR 180 | 20.1 | 32.3 | US 1A in Ellsworth | SR 9 in Clifton | 01925-01-011925 | current | |
| SR 181 | 12.46 | 20.05 | SR 180 in Otis | SR 9 in Amherst | 01925-01-011925 | current | |
| SR 182 | 23.5 | 37.8 | US 1 in Hancock | US 1 in Cherryfield | 01925-01-011925 | current | |
| SR 183 | — | — | US 1 in Ellsworth | SR 198 in Town Hill | 01925-01-011925 | 01931-01-011931 | Became part of SR 102; this section became part of SR 3 in 1933, and is now part of US 1 |
| SR 183 | 5.45 | 8.77 | US 1 in Sullivan | Schoodic Beach Road in Sullivan | 01937-01-01c. 1937 | current | |
| SR 184 | 8.64 | 13.90 | Lamoine Beach in Lamoine | US 1 in Ellsworth | 01925-01-011925 | current | |
| SR 185 | 3.69 | 5.94 | Waukeag Avenue in Sorrento | US 1 in Sullivan | 01925-01-011925 | current | |
| SR 186 | 16.13 | 25.96 | US 1 in Gouldsboro | US 1 in Gouldsboro | 01925-01-011925 | current | |
| SR 187 | 22.85 | 36.77 | US 1 in Columbia Falls | US 1 in Jonesboro | 01925-01-011925 | current | |
| SR 188 | — | — | US 1 in East Machias | Cutler | 01925-01-011925 | 01933-01-011933 | Became part of SR 191 |
| SR 188 | 15.6 | 25.1 | SR 155 in Enfield | Lord Brook Road near Burlington | 01933-01-01c. 1933 | current | |
| SR 189 | 11.19 | 18.01 | US 1 in Whiting | Route 774 on Campobello Island, NB (Franklin D. Roosevelt Bridge) | 01925-01-011925 | current | |
| SR 190 | 7.09 | 11.41 | Water Street in Eastport | US 1 in Perry | 01925-01-011925 | current | |
| SR 191 | 61.58 | 99.10 | SR 189 in Lubec | US 1 / SR 9 near Baileyville | 01925-01-011925 | current | |
| SR 192 | 20.39 | 32.81 | US 1 in Machias | SR 9 in Wesley | 01925-01-011925 | current | |
| SR 193 | — | — | SR 179 (Now SR 9) in East Eddington | US 1 in East Holden | 01925-01-011925 | 01933-01-011933 | Became part of SR 175 (which has since shifted to the east, and later, that section was renumbered SR 46) |
| SR 193 | 19.11 | 30.75 | US 1 in Cherryfield | SR 9 near Beddington | 01933-01-01c. 1933 | current | |
| SR 194 | — | — | New England Interstate 24 (now SR 10) and SR 165 (now US 1A) in Easton Center | Canada | 01925-01-011925 | 01933-01-011933 | |
| SR 194 | — | — | SR 17 in West Rockport | US 1 in Rockport | 01933-01-011933 | 01949-01-011949 | Became part of SR 90 in 1948, but overlapped SR 90 for a year before decommissioning |
| SR 194 | 16.68 | 26.84 | SR 27 in Pittston | SR 215 in Newcastle | 01951-01-011951 | current | |
| SR 195 | — | — | US 201 in Jackman | SR 15 in Rockwood | 01925-01-011925 | 01940-01-011940 | Became part of SR 15 (now SR 6/SR 15) |
| SR 195 | 8.99 | 14.47 | Crowley Island Road in Gouldsboro | US 1 in Gouldsboro | 01946-01-01c. 1946 | current | Duplicate number; not renumbered after I-195 was opened in 1983 |
| SR 196 | 19.42 | 31.25 | US 202 / SR 11 / SR 100 in Lewiston | US 1 in Brunswick | 01925-01-011925 | current | |
| SR 197 | 20.52 | 33.02 | SR 9 / SR 126 in Sabattus | SR 27 / SR 127 in Dresden | 01925-01-011925 | current | |
| SR 198 | 10.79 | 17.36 | Main Street in Mount Desert | SR 3 in Bar Harbor | 01925-01-011925 | current | |
| SR 199 | 10.57 | 17.01 | SR 166 in Castine | SR 15 in Penobscot | 01925-01-011925 | current | |
| SR 200 | 17.97 | 28.92 | US 1 in Sullivan | SR 179 in Waltham | 01925-01-011925 | current | |
| SR 201 | — | — | SR 18 (now US 302) in Naples | SR 117 in Harrison | 01925-01-011925 | 01926-01-011926 | Renumbered SR 213 (which became part of SR 35 in 1933) because of the creation of US 201 |
| SR 201 | 9.53 | 15.34 | US 201 in Bowdoin | US 201 in Richmond | 01937-01-01c. 1937 | 01946-01-01c. 1946 | Proposed alternate for US 201 but was never approved by AASHTO; renumbered SR 138 in 1946-7 |
| SR 202 | — | — | Main Street in Castine | SR 175 in Castine (now SR 166 / SR 199) | 01925-01-011925 | 01939-01-011939 | After US 202 was designated; SR 202 was renumbered SR 166E in 1939, then to SR 166 in 1940-1 |
| SR 203 | — | — | SR 185 in Sorrento | Downtown Sorrento | 01925-01-011925 | 01928-01-011928 | Became part of SR 185 |
| SR 203 | — | — | SR 110 in West Newfield | New Hampshire | 01928-01-011928 | 01949-01-011949 | Section from SR 109 to SR 110 became part of SR 11 in 1933 |
| SR 203 | 4.62 | 7.44 | SR 131 in Waldo | SR 139 in Brooks | 01950-01-01c. 1950 | 02023-01-012023 | on a 1950 map, but did not appear in route logs until 1953 |
| SR 204 | — | — | SR 218 (now SR 9) in Kennebunkport | US 1 in Kennebunk | 01925-01-011925 | 01933-01-011933 | Became part of SR 35 and SR 9A |
| SR 204 | 6.5 | 10.5 | SR 3 in Trenton | Seal Point / Marlboro Beach Roads in Lamoine | 01936-01-011936 | current | |
| SR 205 | — | — | SR 25 in Cornish | US 1 in West Scarborough | 01925-01-011925 | 01933-01-011933 | Became part of SR 5 and SR 9 |
| SR 205 | 10.79 | 17.36 | SR 167 in Presque Isle | SR 161 in Caribou | 01937-01-01c. 1937 | current | |
| SR 206 | — | — | SR 155 (now SR 16) west of Old Town | US 2 in Old Town | 01925-01-011925 | 01933-01-011933 | Became part of SR 43 |
| SR 206 | 1.6 | 2.6 | SR 17 in Washington | SR 105 in Washington | 01933-01-01c. 1933 | current | |
| SR 207 | 2.94 | 4.73 | SR 77 in Scarborough | US 1 / SR 9 / SR 114 in Scarborough | 01925-01-011925 | current | |
| SR 208 | 7.29 | 11.73 | Lester B. Orcutt Blvd. in Biddeford | SR 9 / SR 111 in Biddeford | 01925-01-011925 | current | Mostly overlapped by SR 9 |
| SR 209 | 16.03 | 25.80 | Popham Beach in Phippsburg | US 1 in Bath | 01925-01-011925 | current | |
| SR 210 | 6.20 | 9.98 | US 1 / SR 164 in Presque Isle | US 1 in Presque Isle | 01925-01-011925 | 02007-01-01c. 2007 | All signage removed as of October 2007 |
| SR 211 | — | — | SR 157 in Medway | SR 158 in Medway | 01925-01-01c. 1925 | 01933-01-011933 | Became part of SR 11 |
| SR 211 | 6.7 | 10.8 | SR 41 in Mount Vernon | SR 27 in Belgrade | 01933-01-01c. 1933 | 01957-01-011957 | |
| SR 212 | 10.28 | 16.54 | SR 11 in Moro Plantation | US 2 in Smyrna | 01925-01-011925 | current | |
| SR 213 | — | — | SR 18 (now US 302) in Naples | SR 117 in Harrison | 01926-01-011926 | 01933-01-011933 | Became part of SR 35 |
| SR 213 | 9.35 | 15.05 | SR 215 in Newcastle | SR 126 in Jefferson | 01933-01-01c. 1933 | current | |
| SR 214 | — | — | SR 9 in North Berwick | SR 109 in Sanford | 01928-01-011928 | 01931-01-011931 | Became part of SR 4 |
| SR 214 | 9.96 | 16.03 | SR 191 in Meddybemps | US 1 in Pembroke | 01933-01-01c. 1933 | current | |
| SR 215 | — | — | SR 134 in Readfield | SR 100 (now also US 202 and SR 11 in Manchester | 01928-01-011928 | 01933-01-011933 | Became part of SR 17 |
| SR 215 | 17.43 | 28.05 | US 1 Bus. in Newcastle | SR 32 in Jefferson | 01933-01-01c. 1933 | current | |
| SR 216 | 2.3 | 3.7 | Small Point in Phippsburg | SR 209 in Phippsburg | 01928-01-011928 | current | |
| SR 217 | 1.22 | 1.96 | Kenyon / Sebasco Roads in Phippsburg | SR 209 in Phippsburg | 01928-01-011928 | 02007-01-012007 | Designation of Sebasco Road between Kenyon Road and SR 209; all signage was removed as of March 2007 |
| SR 218 | — | — | US 1 in Elms | SR 204 (now SR 35 and SR 9A) in Kennebunkport | 01928-01-011928 | 01933-01-011933 | Became part of SR 9 |
| SR 218 | 20.96 | 33.73 | US 1 / SR 27 in Wiscasset | SR 17 / SR 32 in Whitefield | 01933-01-01c. 1933 | current | |
| SR 219 | — | — | US 2 in Rumford Point | South Arm | 01928-01-011928 | 01933-01-011933 | Became part of SR 5 (which was later decommissioned north of Andover) |
| SR 219 | 35.1 | 56.5 | Greenwood Road in Greenwood | SR 133 in Wayne | 01933-01-01c. 1933 | current | |
| SR 220 | 66.66 | 107.28 | SR 97 in Friendship | SR 11 / SR 100 in Palmyra | 01929-01-011929 | current | |
| SR 221 | 16.05 | 25.83 | SR 15 in Bangor | SR 11 / SR 155 in Bradford | 01931-01-01c. 1931 | current | |
| SR 222 | — | — | US 1 in Caribou | Canada border | 01931-01-011931 | 01933-01-011933 | Became part of SR 161 |
| SR 222 | 27.65 | 44.50 | SR 7 / SR 11 / SR 43 in Corinna | US 2 / SR 100 in Bangor | 01936-01-011936 | current | |
| SR 223 | 6.45 | 10.38 | SR 89 in Caribou | US 1A in Limestone | 01931-01-01c. 1931 | current | |
| SR 224 | — | — | SR 100 (now SR 7) in Dexter | SR 105 in Guilford (now SR 6/SR 15/SR 16) | 01931-01-011931 | 01933-01-011933 | Became part of SR 24 (this section now part of SR 23) |
| SR 224 | 2.09 | 3.36 | SR 11 / SR 11A / SR 109 in Sanford | US 202 / SR 4A in Sanford | 01933-01-01c. 1933 | current | |
| SR 225 | 5.65 | 9.09 | SR 27 in Rome | SR 8 / SR 137 in Smithfield | 01932-01-011932 | current | |
| SR 226 | 5.50 | 8.85 | SR 27 / SR 126 in Randolph | SR 17 in Chelsea | 01934-01-011934 | current | |
| SR 227 | 24.51 | 39.45 | SR 11 in Ashland | SR 163 in Presque Isle | 01939-01-01c. 1939 | current | |
| SR 228 | 16.93 | 27.25 | SR 164 in Washburn | SR 161B in Caribou | 01939-01-01c. 1939 | current | |
| SR 229 | 1.96 | 3.15 | US 1A in Limestone | Route 375 in Grand-Sault, NB (Limestone–Gillespie Portage Border Crossing) | 01939-01-01c. 1939 | current | |
| SR 230 | 14.24 | 22.92 | SR 3 in Trenton | US 1 / SR 3 in Ellsworth | 01946-01-01c. 1946 | current | |
| SR 231 | 11.52 | 18.54 | SR 115 in North Yarmouth | US 202 / SR 4 / SR 100 in New Gloucester | 01954-01-011954 | current | |
| SR 232 | 9.3 | 15.0 | SR 26 in Woodstock | US 2 in Rumford | 01955-01-011955 | current | |
| SR 233 | 5.85 | 9.41 | SR 3 / SR 198 in Mount Desert | SR 3 in Bar Harbor | 01956-01-011956 | current | |
| SR 234 | 18.67 | 30.05 | SR 145 / SR 149 in Strong | US 201A / SR 8 in Anson | 01956-01-011956 | current | |
| SR 235 | 23.71 | 38.16 | US 1 in Waldoboro | SR 52 / SR 173 in Lincolnville | 01957-01-011957 | current | |
| SR 236 | 15.8 | 25.4 | SR 103 in Kittery | SR 9 in Berwick | 01957-01-011957 | current | |
| SR 237 | 8.18 | 13.16 | SR 25 in Gorham | SR 35 in Standish | 01957-01-011957 | current | Originally designated SR 95 in 1946-7; renumbered SR 237 after I-95 was designated in 1957 |
| SR 238 | 3.76 | 6.05 | SR 27 in Southport | SR 27 in Southport | 01975-01-011975 | current | |
| SR 701 | 1.77 | 2.85 | US 1 / SR 9 in Scarborough | I-295 in South Portland | — | — | Scarborough Connector; posted on mile markers every 0.2 miles (0.32 km) with an origin point at the northern end |
| SR 703 | 1.91 | 3.07 | I-95 in South Portland | US 1 / SR 9 in South Portland | 02004-01-01c. 2004 | current | Maine Turnpike Approach Road, also known as the Maine Mall Connector; posted on mile markers every 0.2 miles (0.32 km) with an origin point at the western end |
| Former ||||||||

## Special routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| SR 4A | 6.5 | 10.5 | SR 4 / SR 109 in Sanford | US 202 / SR 4 / SR 111 in Alfred | 01946-01-01c. 1946 | current | Southern segment |
| SR 4A | 4.0 | 6.4 | US 202 / SR 4 / SR 35 in Hollis | US 202 / SR 4 in Buxton | 01937-01-01c. 1937 | current | Northern segment |
| SR 5A | 2.1 | 3.4 | SR 5 in Lovell | SR 5 in Lovell | 01960-01-011960 | 02003-01-01c. 2003 | |
| SR 9A | 11.28 | 18.15 | SR 9 in Wells | SR 9 / SR 35 in Kennebunk | 01933-01-01c. 1933 | current | |
| SR 9B | 4.14 | 6.66 | SR 9 in Wells | US 1 in Wells | 01933-01-01c. 1933 | current | |
| SR 11A | 3.3 | 5.3 | US 202 / SR 11 in Sanford | SR 11 / SR 109 / SR 224 in Sanford | 01931-01-011931 | current | Southern segment |
| SR 11A | 6.7 | 10.8 | SR 11 in Charleston | SR 11 / SR 221 in Bradford | 01980-01-01c. 1980 | current | Northern segment; formerly SR 11 |
| SR 11B | 0.3 | 0.48 | SR 11 / SR 157 in Millinocket | SR 11 / SR 221 in Millinocket | — | — |
| SR 15 Bus. | 2.8 | 4.5 | I-395 / SR 15 in Brewer | I-95 / SR 15 in Bangor | 02005-01-01c. 2005 | current | Formerly SR 15 |
| SR 15A | — | — | SR 15 in Corinth | SR 15 in Charleston | 01950-01-011950 | 01960-01-011960 | Redesignated SR 15 in 1960 |
| SR 24 Bus. | 4.3 | 6.9 | SR 24 in Brunswick | SR 24 in Topsham | 02014-01-012014 | current | Newest state highway designation in Maine; formerly SR 24 |
| SR 25 Bus. | 2.8 | 4.5 | SR 25 in Westbrook | SR 25 in Portland | 01977-01-01c. 1977 | current | Formerly SR 25 |
| SR 26A | 1.6 | 2.6 | US 202 / SR 4 / SR 26 / SR 100 / SR 115 in Gray | SR 26 in Gray | 02006-01-012006 | 02023-01-012023 | Got Replaced With SR 26 |
| SR 35A | 4.7 | 7.6 | SR 35 in Standish | SR 25 / SR 35 in Standish | 01937-01-01c. 1937 | 02002-01-01c. 2002 | Formerly SR 35; now unnumbered Cape Road west of SR 25 |
| SR 43A | 11.3 | 18.2 | SR 43 in Industry | SR 43 in Anson | 01936-01-011936 | 01946-01-01c. 1946 | Renumbered as an extension of SR 148 in 1946-7 |
| SR 100A | 5.1 | 8.2 | US 201 / SR 100 / SR 137 in Winslow | SR 100 / SR 139 in Benton | — | — |
| SR 102A | 6.7 | 10.8 | SR 102 in Tremont | SR 102 in Southwest Harbor | — | — |
| NH 113B | 1.0 | 1.6 | SR 113 in Stow | SR 113 in Stow | — | — | Despite NH Route designation, loop of SR 113. Of the route's total 3.95 miles (6.36 km), 1.0 mile exist in Maine |
| SR 137 Bus. | 3.01 | 4.84 | SR 137 in Winslow | SR 11 / SR 104 / SR 137 in Waterville | 01997-01-011997 | current | Formerly SR 137 |
| SR 161B | 3.62 | 5.83 | US 1 / SR 161 in Caribou | SR 161 in Caribou | 02012-01-012012 | current | Formerly SR 161, business route designation |
| SR 166A | 3.77 | 6.07 | SR 166 in Castine | SR 166 in Castine | 01946-01-01c. 1946 | current | Originally designated SR 166W; renumbered in 1946-7 |
| SR 172A | 11.3 | 18.2 | SR 172 in Stonington (now SR 15) | SR 172 in Deer Isle (now SR 15) | 01940-01-01c. 1940 | 01963-01-011963 | Decommissioned when SR 172 was truncated in 1963; now unnumbered roads |
| SR 228T | 0.60 | 0.97 | SR 164 in Washburn | SR 228 in Washburn | 01964-01-011964 | current | Only truck route ever designated in Maine |
| Former ||||||||

## Routes crossing state borders

New Hampshire Route 113B and New Hampshire Route 153 enter Maine. NH 153 remains entirely under NHDOT maintenance. NH 113B is a loop of Maine State Route 113. The spans of NH 113B within Maine are considered unnumbered highway by the MDOT. SR 113 enters New Hampshire several times but remains under MDOT maintenance.

### New England Interstates

* New England Route 1
* New England Route 9
* New England Route 11
* New England Route 15
* New England Route 18
* New England Route 19
* New England Route 20
* New England Route 24
* New England Route 25
* New England Route 26