2018 Challenger Banque Nationale de Gatineau – Men's doubles

Bradley Klahn and Jackson Withrow were the defending champions but only Klahn chose to defend his title, partnering Robert Galloway. Klahn successfully defended his title.

Klahn and Galloway won the title after defeating Darian King and Peter Polansky 7–6(7–4), 4–6, [10–8] in the final.

Seeds
• # 🇦🇺 Bradley Mousley / 🇦🇺 Matt Reid (semifinals)

• # 🇺🇸 Robert Galloway / 🇺🇸 Bradley Klahn (champions)

• # 🇦🇹 Lucas Miedler / 🇦🇹 Maximilian Neuchrist (first round)

• # Darian King / 🇨🇦 Peter Polansky (final)