List of numbered roads in Ottawa
The city of Ottawa, Ontario, Canada maintains many regional roads, like most counties and regional municipalities in Southern and Eastern Ontario. The regional road system was created by the Regional Municipality of Ottawa-Carleton and managed by the RMOC until 2001. In 2001, when all six cities, four townships, and one village within the former RMOC amalgamated to form the new city of Ottawa, responsibility of the regional road system was transferred to the new city of Ottawa, and they became today’s “Ottawa roads”.
In general, even-numbered routes run east-west and odd-numbered routes run north-south. Also, the lowest-numbered routes are generally found in the southern part of the city for even numbered routes, and in the western part for odd numbered routes. This pattern, however, has many exceptions. As more roads were added to the numbered-road system, the availability of numbers decreased and consequently, the numbering pattern had to be broken.
In smaller communities and rural areas the numbered roads are, for the most part, adequately signed with trapezoid-shaped signs with rounded corners, which are often referred to as "flowerpots" due to the shape of the sign. Older signs installed prior to 2001 have the legend "Ottawa-Carleton" at the top with the route number underneath. Newer signs installed after 2001 use the legend "Ottawa" or simply the "O" portion of the city's wordmark. Most numbered-road signs are not marked with directional tabs indicating the direction of the road, but where these appear, they are always printed in both English and French.
Most numbered roads in the urban areas of Ottawa are not signed with route numbers, despite having official route numbers and being listed on many maps with these numbers. Instead, most urban sections of numbered roads are referred to by their names. Ottawa's city council adopted an updated route-numbering policy in 2005, under which road numbers are no longer posted inside the Greenbelt except for significant roads such as Ottawa Road 174, a former provincial highway, which is now usually known as "The 174".
During the mass downloading of Ontario’s provincial highways onto regional authorities in 1997 and 1998, the former Regional Municipality of Ottawa-Carleton was given responsibility over former Highways 16, 31, 44, and the section of 17 east of Highway 417. These former highways became known as Regional Roads 73, 31, 49, and 174, respectively.
List
| Number | Names | Western/Southern Terminus | Eastern/Northern Terminus | Major Communities | Notes |
| 2 | Donnelly Drive | Ottawa/Lanark County Border | Ottawa Road 5 | Burritts Rapids | Continues west as Lanark County Road 2. Erroneous "To Highway 16" trailblazers still posted at eastern terminus. Sparsely signed along entire route. |
| 3 | Dwyer Hill Road, Upper Dwyer Hill Road | Ottawa Road 2 | Ottawa Road 22 | Burritts Rapids | Well signed. |
| 4 | Dalmeny Road, Marvelville Road | Ottawa Road 19 | Ottawa Road 41 | Well signed. | |
| 5 | Merlyn Wilson Road, Donnelly Drive, Fourth Line Road, Century Road West, McBean Street, Perth Street, Huntley Road, Stittsville Main Street, Carp Road, Galetta Side Road, Harbour Road, Fitzroy Road, Canon Smith Road, Aylwin Road | Ottawa/Leeds & Grenville County Border | Ottawa Road 7 | Richmond, North Gower, Stittsville, Carp, Fitzroy Harbour | Continues south as Leeds & Grenville County Road 44. Adequately signed. |
| 5A | Stittsville Main Street | Ottawa Road 5 | Ottawa Road 36 | Stittsville | |
| 6 | Roger Stevens Drive, Snake Island Road, Victoria Street | Ottawa/Lanark County Border | Ottawa Road 41, Boundary Road ) | North Gower, Kars, Metcalfe | Continues west as Lanark County Road 4. Popular alternate route to Smiths Falls. Well signed. |
| 6A | Cartwright Road | Ottawa Road 6 | Ottawa Road 41 | ||
| 7 | Ferry Road | Ottawa Road 22 | Toll ferry to Quyon, Quebec | ||
| 8 | Brophy Drive, Bankfield Road, Manotick Main Street, Bridge Street, Mitch Owens Road, Boundary Road, Devine Road, Rockdale Road, Russland Road, Saumure Road | Ottawa Road 49 | Ottawa/Prescott & Russell County Border | Manotick, Greely | Heavy traffic for a rural road. Sparsely signed along entire route. |
| 9 | Dunrobin Road | Ottawa Road 49 | Ottawa Road 22 | Dunrobin | Adequately signed. |
| 10 | Franktown Road, Perth Street | Ottawa/Lanark County Border | Ottawa Road 49 | Richmond | Continues west as Lanark County Road 10. Popular alternate route to Perth and Kingston due to low traffic volume. Well signed. Ottawa Road 10 originally followed Old Richmond Road and Moodie Drive up to Carling Avenue; most of this segment has been replaced by Ottawa Road 59. |
| 11 | Moodie Drive | Ottawa Road 8 | Ottawa Road 32 | Above-average heavy truck traffic due to dumps and quarries. Well signed. | |
| 12 | Fallowfield Road | Ottawa Road 3 | Ottawa Road 73 | Barrhaven | Well signed except at Strandherd Drive intersection, where Fallowfield Road has a 90-degree turn. |
| 13 | Dilworth Road, Rideau Valley Drive South, Roger Stevens Drive, Manotick Main Street, Rideau Valley Drive North, Longfields Drive, Jockvale Road, Greenbank Road, Pinecrest Road | Ottawa Road 5 | Ottawa Road 38 | Nepean, Barrhaven, Manotick, Kars | Adequately signed north of Ottawa Road 12. |
| 14 | Leitrim Road | Ottawa Road 19 | Ottawa Road 26 | ||
| 15 | Woodroffe Avenue | Ottawa Road 73 | Sir John A. Macdonald Parkway | Nepean | Intersection with Prince of Wales Drive has been closed. |
| 16 | Holly Acres Road, Richmond Road, Baseline Road, Heron Road | Ottawa Road 38 | Ottawa Road 74 | Nepean, Ottawa | Parallels old boundary between Ottawa and Nepean for much of its length. |
| 17 | Merivale Road, Clyde Avenue, Maitland Avenue | Ottawa Road 73 | Ottawa Road 38 | Nepean | |
| 17A | Clyde Avenue | Ottawa Road 17 | Ottawa Road 16 | Nepean | No longer exists; subsumed by Ottawa Road 17. |
| 18 | Corkstown Road | Ottawa Road 49 | Ottawa Road 59 | Nepean | Not signed. |
| 19 | River Road, Riverside Drive, Vanier Parkway | Ottawa/Leeds & Grenville County Border | Ottawa Road 44 | Vanier, Ottawa, Riverside South, Manotick | Continues south as Leeds & Grenville County Road 19. Sparsely but adequately signed. |
| 20 | Kinburn Side Road | Ottawa/Lanark County Border | Ottawa Road 9 | Antrim, Kinburn, Woodlawn | Continues west as Lanark County Road 20. |
| 21 | Sixth Line Road, Torwood Drive | Ottawa Road 109 | Ottawa Road 129 | Torbolton | Probably no longer numbered. |
| 22 | Galetta Side Road | Ottawa Road 29 | Ottawa Road 9 | Galetta, Dirleton | |
| 23 | Cedarview Road | Ottawa Road 12 | Ottawa Road 16 | Barrhaven | Only signed at southern terminus. |
| 24 | Lester Road | Ottawa Road 25 | Ottawa Road 31 | Gloucester | |
| 25 | Stagecoach Road, Mitch Owens Road, Albion Road | Ottawa/Stormont, Dundas & Glengarry County Border | Ottawa Road 31 | Gloucester | Continues south as Stormont, Dundas & Glengarry County Road 1. Poorly signed especially at concurrency with Ottawa Road 8. |
| 26 | St. Laurent Boulevard, Ramsayville Road, Russell Road | Ottawa Road 44 | Ottawa/Prescott & Russell County Border | Ottawa | Continues east as Prescott & Russell County Road 26. Not signed in urban areas of Ottawa. |
| 27 | 8th Line Road, Anderson Road, Blair Road | Ottawa Road 6 | Dead end | Metcalfe | Adequately signed south of Innes Road. May no longer be numbered north of Montreal Road. |
| 28 | Bearbrook Road, Innes Road, Blackburn Bypass, Navan Road, Colonial Road | Ottawa Road 34 | Ottawa/Prescott & Russell County Border | Blackburn Hamlet, Notre-Dame-des-Champs, Navan, Sarsfield | Continues on as Prescott & Russell County Road 1. Bearbrook Road and Innes Road portions may no longer be numbered. Concurrent with Ottawa Roads 30 and 128. |
| 29 | Yorks Corners Road | Ottawa Road 4 | Ottawa Road 8 | Kenmore, Edwards | Probably no longer numbered. |
| 29 | Road 29 | Ottawa/Lanark County Border | Ottawa Road 117, Highway 17 | Continues south as Lanark County Road 29. Not named. Formerly part of Highway 15. | |
| 30 | Industrial Avenue, Innes Road | Ottawa Road 19 | Ottawa Road 35 | Ottawa, Blackburn Hamlet, Orleans, Cumberland | Originally ran down Cyrville Road. |
| 31 | Bank Street | Ottawa/Stormont, Dundas & Glengarry County Border | Ottawa Road 34 | Ottawa, Gloucester | Continues south as Stormont, Dundas & Glengarry County Road 31. Briefly known as Ottawa Road 85. Bank Street north of Heron Road was formerly Ottawa Road 85. Bank Street south of Heron Road was formerly Highway 31. |
| 32 | West Hunt Club Road, Hunt Club Road, Hawthorne Road | Ottawa Road 59 | Ottawa Road 26 | Nepean, Gloucester | Signed at Highway 416, Airport Parkway, and Highway 417. Signed as West Hunt Club Road west of the Rideau River, but merely Hunt Club Road east of it. |
| 33 | Rockdale Road, Frank Kenny Road | Ottawa/Prescott & Russell County Border | Ottawa Road 30 | Cumberland | Continues south as Prescott & Russell County Road 28. |
| 34 | Wellington Street, Rideau Street, Montreal Road, St. Joseph Boulevard, Old Montreal Road | Ottawa Road 77 | Ottawa Road 35 | Ottawa, Vanier, Gloucester, Orleans, Cumberland | Former route of Highway 17, also of Highway 17B west of Ottawa Road 174. |
| 35 | Dunning Road, Old Montreal Road, Cameron Street | Ottawa Road 26 | Ferry to Masson-Angers, Quebec | Bearbrook, Leonard, French Hill, Cumberland | The ferry connects to Chemin du Quai in Gatineau. |
| 36 | Hazeldean Road, Robertson Road, Richmond Road, Wellington Street West, Somerset Street West | Highway 7 | Ottawa Road 91 | Stittsville, Kanata, Bells Corners, Nepean, Ottawa | Not signed east of Ottawa Road 59. Formerly Highways 7 and 15 approaching Ottawa from the west. |
| 37 | Saumure Road | Ottawa Road 8 , Indian Creek Road | Ottawa Road 26 | Cumberland | |
| 38 | Carling Avenue | Ottawa Road 49 | Ottawa Road 79 | Kanata, Nepean, Ottawa | Not signed east of Ottawa Road 59. The section from Ottawa Road 36 to Ottawa Road 79 was part of Highway 17B prior to 1998. |
| 39 | Champlain Street | Ottawa Road 34 | Dead end | Orleans | |
| 40 | Slater Street | Ottawa Road 79 | Ottawa Road 91 | One way eastbound. | |
| 41 | Gregoire Road, Boundary Road, Mer Bleue Road | Marionville Road ; Ottawa Road 28 | Ottawa Road 26 ; Ottawa Road 30 | Boundary Road forms the boundary between the City of Ottawa and Prescott & Russell County. Two sections, separated by the Mer Bleue Conservation Area. | |
| 42 | Albert Street | Slater Street | Ottawa Road 91 | Ottawa | One way westbound. |
| 43 | Ramsayville Road | Ottawa Road 8 | Ottawa Road 74 | ||
| 44 | St. Patrick Street / Murray Street, Beechwood Avenue, Hemlock Road | Alexandra Bridge | Ottawa Road 26 | Ottawa, Vanier, Rockcliffe Park | |
| 45 | Munster Road | Ottawa Road 10 | Ottawa Road 12 | Munster | Well signed. |
| 46 | Thomas A. Dolan Parkway | Ottawa Road 5 | Ottawa Road 9 | Dunrobin | Well signed. |
| 47 | Tenth Line Road | Ottawa Road 28 | Jeanne d'Arc Boulevard North | Burromee, Orleans | |
| 47A | Old Tenth Line Road | Ottawa Road 47 | Ottawa Road 34 | Orleans | |
| 48 | Laurier Avenue West, Laurier Avenue East, Charlotte Street | Ottawa Road 79 | Ottawa Road 34 | Ottawa | |
| 49 | Eagleson Road, March Road | Ottawa Road 8 | Ottawa/Lanark County Border | Richmond, Kanata, South March, Westwood, Carp, Corkery | Continues west as Lanark County Road 49. Was Highway 44 prior to April 1, 1997 from then-Highway 17 to Ottawa/Lanark County border. Sparsely signed north of Ottawa Road 10. Classified as a north-south road though much of it runs east-west. March Road intersects Highway 417 at two separate interchanges. |
| 50 | Coventry Road, Ogilvie Road | Ottawa Road 19 | Ottawa Road 34 | Ottawa, Gloucester | |
| 51 | Meadowlands Drive West, Meadowlands Drive East, Hog's Back Road, Brookfield Road | Ottawa Road 15 | Ottawa Road 79 | Nepean, Ottawa | An east-west road with an odd number, against the convention. |
| 52 | Knoxdale Road | Ottawa Road 32 | Ottawa Road 15 | Nepean | Used to continue west to Old Richmond Road before West Hunt Club Road replaced most of Knoxdale Road. Current segment may no longer be numbered. |
| 53 | MacFarlane Road | Ottawa Road 17 | Ottawa Road 73 | Nepean | Access to Prince of Wales Drive is now via Deakin Street. Probably no longer numbered. |
| 54 | Trail Road | Ottawa Road 11 | Barnsdale Road | Nepean | |
| 55 | Jeanne d'Arc Boulevard South | Ottawa Road 30 | Ottawa Road 174 | Orleans | |
| 56 | Orléans Boulevard | Ottawa Road 30 | Ottawa Road 34 | Orleans | A mostly north-south road with an even number, against the convention. |
| 57 | Trim Road | Ottawa Road 30 | Ottawa Road 174 | Orleans | |
| 59 | Old Richmond Road, Moodie Drive | Ottawa Road 12 | Ottawa Road 38 | Richmond, Bells Corners, Fallowfield | Well signed. |
| 60 | Catherine Street | Ottawa Road 79 | Ottawa Road 91 | Ottawa | One way westbound. The section from Ottawa Road 79 to Ottawa Road 87 was part of Highway 17B prior to 1998. |
| 61 | Terry Fox Drive | Ottawa Road 36 | Campeau Drive | Kanata | Not signed. |
| 62 | Imperial Avenue, Chamberlain Avenue, Isabella Street | Ottawa Road 79 | Ottawa Road 91 | Ottawa | One way eastbound. The section from Ottawa Road 79 to Ottawa Road 83 was part of Highway 17B prior to 1998. |
| 63 | Merivale Road | Ottawa Road 17 | Ottawa Road 38 | Nepean, Ottawa | Merivale Road south of Clyde Avenue is part of Ottawa Road 17. |
| 64 | Greenfield Avenue, Mann Avenue | Ottawa Road 72 | Chapel Street | Ottawa | |
| 65 | Churchill Avenue North | Ottawa Road 36 | Scott Street | Ottawa | |
| 66 | Lees Avenue | Ottawa Road 72 | Chapel Crescent | Ottawa | |
| 67 | Kirkwood Avenue | Ottawa Road 63 | Ottawa Road 36 | Ottawa | |
| 68 | North River Road, McArthur Avenue | Ottawa Road 34 | Ottawa Road 26 | Vanier, Ottawa | |
| 69 | Fisher Avenue, Holland Avenue | Ottawa Road 73 | Scott Street | Nepean, Ottawa | Southern half forms part of the old boundary between Nepean and Ottawa. |
| 71 | Parkdale Avenue | Ottawa Road 38 | Sir John A. Macdonald Parkway | Ottawa | |
| 72 | Main Street, Smyth Road | Colonel By Drive | Ottawa Road 26 | Ottawa | |
| 73 | Prince of Wales Drive, Preston Street | Ottawa Road 5 | Ottawa Road 38 | North Gower, Manotick | Much of this route was part of Highway 16 prior to 1998. Very poorly signed except at southern terminus. |
| 74 | Walkley Road | Ottawa Road 19 | Ottawa Road 43 | Ottawa | |
| 75 | Rochester Street | Ottawa Road 38 | Gladstone Avenue | Ottawa | |
| 76 | Commissioner Street | Former route of Wellington Street | Ottawa Road 79 | Ottawa | |
| 77 | Booth Street, Chaudière Crossing | Albert Street | Ontario/Quebec Border | Ottawa | |
| 79 | Airport Parkway, Bronson Avenue, Commissioner Street | Macdonald-Cartier International Airport | Ottawa Road 42 | Airport Parkway is a controlled access Super two freeway that is scheduled to be upgraded to a four lane freeway from Brookfield Road to Ottawa Road 32. Splits into two one-way streets at the north end. Signed only at major intersections. | |
| 80 | Bayview Station Road, Bayswater Avenue | Scott Street | Ottawa Road 36 | Ottawa | |
| 81 | Lyon Street North | Ottawa Road 60 | Ottawa Road 34 | Ottawa | One way southbound. |
| 83 | Kent Street | Ottawa Road 62 | Ottawa Road 34 | Ottawa | One way northbound. Was part of Highway 17B prior to 1998. |
| 84 | Place d'Orléans Drive | Ottawa Road 34 | Ottawa Road 34 | Orleans | Crescent serving Place d'Orléans. |
| 85 | Milton Road | Ottawa Road 26 | Ottawa Road 28 | Cumberland | Some maps mislabel Bank Street as Ottawa Road 85, a former designation of Bank north of Heron Road that was briefly extended to all of Bank after the downloading of Highway 31. |
| 86 | Hope Side Road | Ottawa Road 49 | Ottawa Road 59 | ||
| 87 | O'Connor Street | Ottawa Road 62 | Ottawa Road 34 | Ottawa | One way southbound. Was part of Highway 17B prior to 1998. |
| 88 | Huntmar Drive, Campeau Drive, Palladium Drive | Ottawa Road 88 | Ottawa Road 61 | Kanata | Western section is a loop. |
| 89 | Metcalfe Street | Ottawa Road 62 | Ottawa Road 34 | Ottawa | One way northbound. |
| 91 | Hawthorne Avenue, Elgin Street | Ottawa Road 72 | Ottawa Road 34 | Ottawa | |
| 93 | Colonel By Drive, Sussex Drive, Princess Avenue | Daly Avenue | Sir George-Étienne Cartier Parkway | Ottawa | |
| 95 | Nicholas Street | Mann Avenue | Ottawa Road 34 | Ottawa | The section north of Laurier Avenue is one way southbound. |
| 97 | Waller Street | Mackenzie King Bridge | Ottawa Road 34 | Ottawa | |
| 99 | Lees Avenue, King Edward Avenue | Chapel Crescent | Sussex Drive | Ottawa | |
| 107 | Uplands Drive | Ottawa Road 79 | Ottawa Road 32 | Gloucester | |
| 109 | Cameron Harvey Drive | Ottawa Road 9 | Ottawa Road 21 | Probably no longer numbered. Not signed. Formerly Riddell Drive. | |
| 111 | Data Centre Road | Ottawa Road 16 | Ottawa Road 19 | Ottawa | |
| 114 | Osgoode Main Street | Ottawa Road 19 | Ottawa Road 25 | Osgoode | Well signed. |
| 117 | Madawaska Boulevard | Ottawa Road 29, Highway 17 | Ottawa/Arnprior Border | Was part of Highway 17 prior to construction of Highway 417 bypass. A section from here south through Antrim almost to Grants Side Road is still officially part of Highway 17. Continues north as Renfrew County Road 1. | |
| 125 | Conroy Road | Ottawa Road 31 | Ottawa Road 74 | Gloucester, Ottawa | |
| 128 | Cyrville Road, Innes Road, Blackburn Bypass | Ottawa Road 26 | Ottawa Road 30 | Gloucester | Originally, Ottawa Road 128 was Innes Road west of Cyrville, while Ottawa Road 30 followed Cyrville. Concurrent with Innes Road between Blackburn Bypass and Cyrville. |
| 129 | Vances Side Road | Ottawa Road 9 | Ottawa Road 21 | Torbolton | An east-west road with an odd number, against the convention. Probably no longer numbered. Not signed. |
| 174 | Queensway, Ottawa Road 174, "Highway 174", or simply "The 174" | Highway 417 | Ottawa/Prescott & Russell County Border | Orleans, Cumberland | Was Highway 17 prior to January 1, 1998. The Queensway name dates to the 1950s, before the construction of Highway 417, when this was part of the original freeway. Ottawa's highest numbered road and only municipally maintained controlled access freeway. Poorly signed except at interchange on-ramps. Continues east as Prescott & Russell County Road 17. |
| 248 | Hazeldean Road, Robertson Road | Highway 7 | Ottawa Road 16 | Bells Corners | No longer exists; subsumed by Ottawa Road 36. Temporary routing also existed along Castlefrank Road. |