Kinahan is a surname. Notable people with the surname include:
Cecil Kinahan (1879–1912), Irish track and field athlete Charles Kinahan (1915–1995), Northern Irish politician Kinahan Organised Crime Group, led by Christy and Daniel Christy Kinahan (born 1958), Irish criminal Daniel Kinahan (born 1977), Irish criminal Danny Kinahan (born 1958), Northern Irish politician George Henry Kinahan (1829–1908), Irish geologist John Robert Kinahan (1828–1863), Irish carcinologist Harold Kinahan (1893–1980), British Royal Navy officer Kevin Kinahan (born 1971), Irish hurler Oliver John Kinahan (1923-2018), British Army officer Robin Kinahan (1916–1997), Northern Irish politician and businessman Robert Henry Kinahan (1799–1866), Irish politician