David Boily (born April 28, 1990) is a Canadian former professional cyclist.

In the 2012 Tour of California, Boily held the red jersey awarded for the best climber for the first two stages before fellow Canadian Sebastian Salas (Optum–Kelly Benefit Strategies) took it from him on Stage 3. Boily stated that he was ready to fight to regain the jersey, and he did battle by raking in more points for the mountain classification, but ultimately Salas kept the lead with a total of 65 points, Boily finishing in second position with 48.