Launch Complex 4 may refer to:
- Cytochrome c oxidase, a component of the electron transport system
- Cape Canaveral Air Force Station Launch Complex 4, one of the first series of launch complexes to be built at Cape Canaveral Air Force Station, used in the 1950s.
- Vandenberg Air Force Base Space Launch Complex 4, a launch site at Vandenberg Air Force Base, currently active.
This disambiguation page lists articles associated with the title Launch Complex 4.
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