Mercury 2 or variants may refer to:

• Mercury 2, a spacecraft of Project Mercury
• Mercury(II), an oxidation state of the element Mercury
• Mercury II, a version of the Blackburn Mercury early British aircraft
• Mercury II, a 1928 version of the Bristol Mercury aircraft engine
• Mercury 2, a defunct website that hosted older versions of a popular MMO game. It was owned by a person known as "Taskmanager".

• Mercury (disambiguation)
• Mercury-Redstone 2, a 1961 space flight test
• Mercury-Atlas 2, a 1962 space flight test

This disambiguation page lists articles associated with the title Mercury 2.
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