Diercks is a surname. Notable people with the surname include:
Carsten Diercks (1921–2009), German documentary filmmaker Friedrich Diercks (1796–1848), German-born American settler Grete Diercks (1890–1978), German actress John Diercks (1927–2020), American composer Justin Diercks (born 1980), American stock car racing driver Ross Diercks (born 1957), American politician