Mercury 1 or variants may refer to:
Mercury 1, a spacecraft of Project Mercury Mercury(I), an oxidation state of the element Mercury Mercury One, a non-profit organization founded by Glenn Beck Mercury I, a version of the Blackburn Mercury early British aircraft Mercury I, a 1926 version of the Bristol Mercury aircraft engine
See also Mercury (disambiguation) Mercury-Redstone 1, a 1960 space flight test Mercury-Redstone 1A Mercury-Atlas 1, a 1960 space flight test Mercury-Scout 1, a 1961 spacecraft