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 organisation 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
edit- Mercury (disambiguation)
- Mercury-Redstone 1, a 1960 space flight test
- Mercury-Atlas 1, a 1960 space flight test
- Mercury-Scout 1, a 1961 spacecraft