Great Lake Swimmers is a Canadian band built around the melodic folk rock songs of singer-songwriter Tony Dekker. Originally from Wainfleet, Ontario, the band is currently based in Toronto.

The current touring line-up includes Tony Dekker on lead vocals, acoustic guitar and harmonica, Erik Arnesen on banjo, electric guitar and harmonium, Joshua Van Tassel on drums, Bret Higgins on upright bass and Miranda Mulholland on violin and backing vocals. Past members included Julie Fader on backing vocals, Sandro Perri on guitar, and Greg Millson and Colin Huebert on drums.

The band's style has been compared to Red House Painters, Nick Drake, Iron & Wine and Neil Young, as well as Will Oldham (Bonnie "Prince" Billy) and Sufjan Stevens. Dekker has said his influences include Gram Parsons and Hank Williams.