FCX

FCX may refer to:
 * FCX file compression, an older file compression utility and format used on VAX and personal computers.
 * Honda FCX, a family of hydrogen fuel cell automobiles from Honda
 * Honda FCX Clarity, a new-generation hydrogen fuel cell car from Honda
 * Freeport-McMoRan, a mining company whose NYSE ticker symbol is FCX
 * Bell FCX-001, a concept helicopter by Bell Helicopter