David Welch may refer to: David A. Welch (born 1960), Canadian political scientist David Welch (diplomat) (born 1953), American diplomat David Welch (baseball) (born 1983), baseball pitcher David Welch (optical engineer) (born 1960), American businessman and research scientist David Welch (historian), English historian David E. Welch (1835–?), Wisconsin state assemblyman and senator David Welch (New Hampshire politician) (born 1940), member of the New Hampshire House of Representatives Dave Welch, British poker player Dave Welch (admiral), United States Navy admiral