Jack Copley Winslow (18 August 1882 – 1974), also known by names John Copley Winslow or J.C. Winslow or John C. Winslow or Jack C. Winslow, was an English Society for the Propagation of the Gospel (SPG) missionary to Konkan and Pune, then-Poona—both part of then-Bombay Presidency. He was an evangelist, hymnist, and the founder of Christa Seva Sangh—interpreted as Community of the Servants of Christ or The Fellowship of the Servants of Christ and/or The Christian Fellowship of Service.