Canada's Worst Driver is a Canadian television series that aired on Discovery Channel from 2005 to 2018, based on Britain's Worst Driver. It and sister series Canada's Worst Handyman (2006-2011) are the two highest-rated programs on Discovery Channel. The series was produced by Proper Television whose president, Guy O'Sullivan, was the director for the original Britain's Worst Driver series; as such, Canada's Worst Driver is considered to be the production company's flagship show. Unlike other Worst Driver series around the world, the Canadian version emphasizes the learning process of the contestants and the science of driving; as such, it is often more serious than the other Worst Driver shows, which are mainly played for laughs. It is the second-longest running of any Worst Driver series to date with 14 seasons and 115 episodes (assuming specials are included; only Finland's Suomen surkein kuski has run longer). The series was hosted by Andrew Younghusband for all 14 seasons.

In each season, eight drivers and their nominators are taken to the Driver Rehabilitation Centre, where they compete in challenges designed to improve their driving skills in an effort to not be named Canada's Worst Driver. In the first challenge, the contestants begin at a location about an hour's drive from the Driver Rehabilitation Centre; for the contestants' first challenge, they must head to the Driver Rehabilitation Centre, following the directions given to them. After arriving at the Driver Rehabilitation Centre, the driver's licenses of each contestant is confiscated. The first episode concludes with an obstacle course challenge-- meant to evaluate the skills of the individual drivers-- in which contestants must routinely maneuver their cars through tight spaces with less than an inch of clearance on either side. To show that the challenge can be done without hitting obstacles by an average driver, host Andrew Younghusband performs each challenge before any contestant attempts the challenge. Beginning with the second episode, each contestant meets with the host and a panel of four experts for an evaluation of their performance. After all contestants are interviewed, the judges and host deliberate on which contestant–nominator pair have improved enough to graduate from the Driver Rehabilitation Centre. The driver who has graduated is eliminated from the competition and is sent home with their licenses returned to them; the contestants typically drive off with their nominators in the car that they used to arrive at the Driver Rehabilitation Centre. The experts also reserve the right to not graduate anyone for any episode or to graduate multiple contestants at the same time. The experts may also choose to expel any contestant who does not show any incentive to learn or who the experts believe should not continue driving; the licenses are returned. In this case, the contestant is eliminated from the competition, their licenses are returned, and they are given a ride home. The elimination process continues until only three contestants remain. The three remaining contestants are then given the Mega Challenge, an obstacle course challenge with elements of every previous challenge, as well as a standard driver's examination through the streets of a major urban city near the Driver Rehabilitation Centre. Based on these final challenges, the experts determine which among the three is named Canada's Worst Driver. Unlike other versions of the Worst Driver series, where being eliminated early or being the Worst Driver is either rewarded with a new car or had their car destroyed, no prizes are given for being eliminated early or for being named Canada's Worst Driver, aside from a commemorative trophy.

With the exception of the first and last episodes, challenges are specifically tailored to each contestant and designed by Andrew and the driving school sponsoring the series (whose head instructor is one of the experts; for the first three seasons, it was Young Drivers of Canada director of training Scott Marshall; in season four, it was Dan Bagyan of the Signature Driving School; in seasons five-seven, it was Peter Mellor of the Advanced Motoring Bureau and from the eighth season onward, it was Tim Danter of DriveWise). Challenges typically range from traditional driving school lessons such as parallel parking, reversing and driving with a trailer, to those not normally found in a beginner's driving course, such as driving a standard-transmission vehicle and performing extreme driving manoeuvres, such as the Scandinavian flick. However, some challenges are reused from year-to-year, like The Eye of the Needle and The Water Tank Challenge, which were both first introduced in the first season and are the only challenges to be featured in every season.

Season 1's theme was "winter driving." (This was the only season filmed in the winter; all subsequent seasons were filmed during the summer.) The first season's worst driver was Chris Ferguson due to his inexperience and lack of awareness on the road.

Season 2's theme was "summer driving" as the previous season had been filmed in the winter. This season's worst driver was Henrietta Gallant due to her vision issues, her refusal to wear glasses and to admit responsibility for her faults, along with being unable to complete the final road test. This season saw the first expulsion in any Worst Driver series, when Colin Sheppard was expelled due to his unwillingness to learn. This season also saw the first instance of two contestants graduating in the same episode, as Sean McConnell and Jodi Slobodesky graduated in the penultimate episode.

Season 3's theme was "extreme driving manoeuvres." This season's worst driver was Jason Zhang due to his dangerous final road test performance-- stopping in the middle of merging onto Ontario Highway 400. As a result, Jason immediately surrendered his license and gave up driving permanently, the first contestant ever to do so, which made runner-up Shelby D'Souza technically the worst by default. This season saw the first instance of a contestant graduating in the fifth episode, Billie-Jean Leslie.

Season 4's theme was "legal consequences of bad driving." This season's worst driver was Ashley van Ham who, despite passing most of the challenges and being shortlisted four times, including three episodes in a row, was named Canada's Worst Driver for her emotional instability at the wheel and not addressing frustrations with her husband and nominator, Bryan. This made her the youngest driver at the time until Brandon Wilkins received the title in season 14. This season saw the first-ever medical expulsion in any Worst Driver series due to the experts' belief that Donna Hicks should no longer be driving; Donna was eliminated in this manner in part due to angina. This season also saw the only instance of an all-female finale in the series' history.

Season 5's theme was "driver's boot camp." This season's worst driver was Angelina Marcantognini due to her severe anxiety and lack of focus. (Andrew further stated during the Canada's Worst Driver: U Asked! special his belief that Angelina is the worst of the "worst drivers" to date, though he subsequently retracted this statement in Canada's Worst Driver Ever, saying that her severe emotional problems were more of concern for her driving than a lack of technical ability.) This season saw the first time a contestant left due to a personal tragedy, after Crystal Hubley Farao's brother-in-law was fatally injured in a traffic collision when another driver failed to yield the right-of-way.^{[citation needed]} This season was also the first to feature the three finalists driving a convertible on each of their final road tests during the final episode of every subsequent season.