The Sheffield business, which has 58 stores around the country, has been sold for Â£112.3 million.
Go Outdoors founders Paul Caplan and John Graham are set to leave the business.
JD Sports chief executive, Peter Cowgill, said: "Go Outdoors is a great addition to our existing outdoor business.
"The minimal overlap in store locations and their out-of-town, one-stop retailer approach complements the work we have done on the high street with Blacks and Millets and further strengthens our offering in the outdoor sector. I am excited by the future prospects this holds for the JD Group."
In the 53 weeks to January 31 2016, Go Outdoors made revenues of Â£202.2 million and saw a pre-tax profit of Â£4.9 million.
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