OC Transpo is a public transit commission that operates 170 bus routes, three light rail lines, and a paratransit system in Ottawa and the National Capital Region.
The last two digits of route numbers correspond to service area:
<small>NOTE: Routes with a white background operate during select time periods or certain days of the week only. The above is current as of April 27, 2025.</small>
Note: services updated as of April 27, 2025.
A major route overhaul and changes in the network occurred in 2025 due to the opening of Lines 2 and 4, marketed as "New Ways to Bus". Most existing routes saw changes, with some routes being taken out completely. Many new routes were also added to accommodate the changes.
These trips provide service to/from various middle and high school for students enrolled in such schools.
These routes are operated by private bus companies on behalf of OC Transpo. Fares differ by operators, as well as levels of service. Route 505 is considered an event route and is operated by OC Transpo.