This article lists all of the numbered municipal roads in Greater Sudbury, Ontario. Municipal roads in Greater Sudbury are generally numbered with odd numbers for east-west routes and even numbers for north-south routes.

The city of Greater Sudbury is the only census division in Northern Ontario that maintains a system of numbered municipal roads. County or municipal road systems otherwise exist only in Southern Ontario; in the rest of the Northern region, provincially maintained secondary highways serve a similar function. Several of the city's municipal roads were also numbered as secondary highways prior to the creation of the current municipal road system in 1973.

Prior to the amalgamation of the current city of Greater Sudbury, the numbered road system was maintained by the Regional Municipality of Sudbury, and the roads were designated as regional, rather than municipal, roads.

Number	Names	Western/Southern Terminus	Eastern/Northern Terminus	Major Communities	Comments
3	Bay Street	MR 4	MR 55	Whitefish	Crosses over but does not interchange with Highway 17, just east of the Highway 17/MR 55 intersection.
4	Fairbank Lake Road	Highway 17	Intersection of Wickie Road and Park Road	Worthington	Travels through the ghost town of Victoria Mines. Formerly Highway 658
5	Spanish River Road	municipal boundary with township of Nairn and Hyman	MR 4 in Worthington	Turbine	An alternate route to MR 55 and Highway 17, also links MR 4 and MR 3 to Highway 17. At the western city limits, the roadway continues as McIntyre Street in Nairn Centre.
8	Nickel Street, Third Avenue, Mine Road	Highway 144	Mine Road	Onaping, Levack	Main road into Onaping and Levack. Formerly Highway 544 and 544A.[1][2]
10	Panache Lake Road	Panache North Shore Road	MR 55	Whitefish	Formerly Highway 549
12	Gordon Lake Road	MR 13	Highway 144	Larchwood	Gordon Lake Road (MR 12) ends at Vermilion Lake Road (MR 13) near the Vermilion River bridge and continues south as a private road known as the Lockerby Mine Access Road to MR 3 near Whitefish.[3]
13	Vermilion Lake Road, Joseph Street	Mina Street	Highway 144	Larchwood, Hull	Listed as Ontario's Worst Road in October 2007.[4]
14	Errington Avenue, Main Street	Highway 144	MR 15	Chelmsford
15	Municipal Road 15, Main Street	Intersection of Highway 144 and MR 35	MR 80	Chelmsford, Boninville, Blezard Valley, Val Caron	Formerly Highway 634
18	Montée Rouleau, Gagnon Street	MR 35	MR 15	Azilda
21	Notre-Dame Street	MR 35	MR 35	Azilda	Travels through the community of Azilda
24	Municipal Road 24, Main Street	MR 55	Highway 144	Lively	Passes by the ghost town of Creighton Mine. Formerly Highway 536
30	Power Street, Godfrey Drive	MR 55	MR 32	Copper Cliff	The route formerly followed Clarabelle Mine Rd., which is owned and maintained by Vale Inco. The road was closed to the public in the spring of 2007.[5]
32	Balsam Street	MR 55	MR 30	Copper Cliff
34	Big Nickel Mine Road	Interchange with MR 55	MR 35	Gatchell/Little Britain	Big Nickel is located on this road; effectively a two-lane freeway as it has no intersections except its termini and the entrance to Dynamic Earth. Listed on new eastbound signage on MR 55 as Big Nickel Road, it was previously known as LaSalle Boulevard in the late 70s and well into the 1980s. On May 7, 2004 the Big Nickel Mine Rd. bridge collapsed on a roadway below known as Lorne Street during the reconstruction of the bridge. No one was hurt in the incident.
35	Elm Street	MR 55	Intersection of Highway 144 and MR 15	Chelmsford, Azilda, Downtown	Former routing of Highway 144, until opening of the city's Northwest Bypass in 1986. Historic Murray Mine site located on this road. A section of Municipal Road 35 between the eastern intersection of Notre-Dame Street (Municipal Road 21) in Azilda to Highway 144 in Chelmsford is currently a two-lane highway. There are plans to widen that section of highway, although no date has been announced.[6] Construction to widen Municipal Rd. 35 is set to begin in the fall of 2018.[7]
37	Kelly Lake Road	Southview Drive	MR 55	Robinson
38	Regent Street, Beatty Street	Intersection with MR 55 and MR 46	Intersection with MR 42 and MR 58	Little Britain	Basically an extension of MR 46 and MR 58
39	Ramsey Lake Road	MR 80	Kirkwood Drive	south shore of Ramsey Lake	Science North is located near this road's western terminus at MR 80, while Laurentian University is located near the eastern terminus.
40	Martindale Road	Intersection of MR 40, MR 46 and MR 47	MR 55	Robinson	Basically an extension of MR 47
42	Frood Road, Elm Street	MR 71	MR 67	Downtown/Donovan/Northern Heights	Has a brief concurrency with MR 55; access road to Frood Mine. Briefly was the first original route of Highway 547 from 1956 to 1960.
43	Ontario Street, McLeod Street, Hyland Drive	MR 40	MR 46	Gatchell
45	York Street	MR 46	MR 80	near downtown
46	Regent Street	Interchange with Highway 69 (future Highway 400) and Highway 17	Intersection with MR 55 and MR 38	Lo-Ellen/Four Corners/Lockerby	Basically an extension of MR 38
47	Walford Road	Intersection of MR 40 and MR 46	MR 80	Lockerby	Basically an extension of MR 40
49	Lorne Street	MR 55	MR 35	Downtown	Former route of MR 55
51	Larch Street	MR 67	MR 49	Downtown
53	Cedar Street	MR 67	MR 49	Downtown
55	Old Highway 17, Lorne Street, Douglas Street, Brady Street, Lloyd Street,The Kingsway	Highway 17, west of Whitefish	Highway 17, 3 km west of Coniston	Whitefish, Naughton, Lively, Copper Cliff, Gatchell, Downtown, Minnow Lake, Coniston	Former alignment of Highway 17. Surrendered this designation in Walden with the construction of freeway alignment in the early 1980s, and in the old city of Sudbury when the Southeast Bypass was constructed in 1995. Is a dual carriageway for part of its length.
57	Van Horne Street	MR 80	MR 67	Downtown
58	Kathleen Street	Intersection of MR 42 and MR 38	MR 80	Donovan/Flour Mill	Basically an extension of MR 38
61	Ste-Anne Road	Intersection of Mackenzie Street and MR 67	MR 80	Downtown
63	College Street	Intersection of 35/55	MR 58	Downtown
66	Barry Downe Road	MR 55	MR 73	New Sudbury
67	Elgin Street, Morris Street, Howey Drive, Bellevue Avenue, Bancroft Drive, Allan Street, Government Road, East Street, Birch Street	Intersection with MR 55 and MR 61	Highway 17	Downtown, Brodie, Minnow Lake, Adamsdale, Coniston
68	Auger Avenue	MR 86	MR 71	New Sudbury
70	Bancroft Drive	MR 67	MR 55	Minnow Lake	Bancroft Drive continues as MR 67 from Bellevue Avenue to Allan Street in Coniston.
71	LaSalle Boulevard	Interchange with MR 35	MR 86	New Sudbury	West of Lorraine Avenue, westbound traffic continues at a loop ramp interchange where MR 73, Maley Drive transitions to LaSalle Boulevard while eastbound traffic splits where MR 86 Maley Drive begins near Collège Boréal. Phase 2 construction of Maley Drive will see LaSalle Boulevard as a 4 laned undivided expressway from west of a roundabout at the entrance to Collège Boréal to the interchange with MR 35 Elm Street. Big Nickel Mine Road was previously a western extension of LaSalle Boulevard in the late 70s well into the 1980s.
72	Second Avenue	MR 67	Intersection of MR 55 and MR 86	Minnow Lake	Continues as MR 86
73	Maley Drive	Interchange with MR 71	MR 86	New Sudbury	Turns into MR 71 east of Collège Boréal where westbound LaSalle Boulevard traffic enters at an interchange in a loop ramp and eastbound traffic splits where Maley Drive begins. Maley Drive is a 4 lane divided freeway at the LaSalle Boulevard split interchange to a roundabout with MR 66 and continues as a 4 lane divided expressway to a roundabout with Lansing Avenue.
74	Moonlight Beach Road	MR 67	MR 55	Adamsdale
80	Long Lake Road, Paris Street, Notre-Dame Avenue (Sudbury), Old Highway 69, Notre-Dame Avenue (Hanmer), Côté Boulevard	Intersection of Dew Drop Road and Tilton Lake Road	MR 85	Four Corners, Downtown, Val Caron, Val Thérèse, Hanmer	Route from intersection with MR 46 north to Capreol Road was formerly part of Ontario Highway 69. It was downloaded to the Region in the early 1980s. The Long Lake Road portion (from Four Corners to Dew Drop Road) was once Provincial Highway 543.
84	Capreol Road, Sellwood Avenue, Milnet Road	MR 80	Dead-end in the woods at the Greater Sudbury/Sudbury District border	Hanmer, Capreol, Sellwood	The ghost town of Milnet can easily be reached by turning onto a sideroad and driving for roughly 1 km. Part from Milnet to Sellwood Mine was part of Highway 806, and the rest of the road was part of former Highway 545.
85	Radar Road	MR 86	MR 80	Hanmer
86	Falconbridge Highway, Skead Road	Intersection of MR 55 and 72	Skead	New Sudbury, Garson, Skead	Has an old diversion (Old Skead Road). Continues as MR 72. Sudbury Airport is located on this road. Formerly Highway 541
88	Elmview Drive	MR 80	Dominion Drive	Hanmer
89	Longyear Drive	MR 86	Edison Road	Falconbridge	Formerly Highway 541A
90	Garson-Coniston Road	Highway 17	MR 86	Garson, Coniston
93	Second Avenue	MR 67	Highway 17	Coniston
96	Desmarais Road	MR 80	Intersection with Nelson Lake Road and Frenchman Lake Road	Val Thérèse
97	Capreol Lake Road	MR 84	Intersection of 4th Fire Road, 5th Fire Road, and 6th Fire Road, half-way between Capreol and the Wahnapitae 11 Indian Reserve	Capreol
537	Municipal Road 537	Highway 537 at Finni Road	Highway 17	Wahnapitae	Formerly part of Highway 537.