C. Mayer

C. Mayer may refer to:
 * C. Mayer (crater), a lunar crater named after the astronomer Christian Mayer (1719–1783)
 * people named Christian Mayer
 * people named Christopher Mayer
 * people named Carl Mayer
 * people named Charles Mayer
 * Christa Mayer - German mezzo-soprano
 * Constant Mayer - French painter