Common chord
Common chord may refer to:
- Common chord (geometry), the secant line that joins the intersection points of two curves
 - Common chord (music), a chord shared by two musical keys
 - The Common Chord, a 1947 short story collection by Frank O'Connor
 - Common Chord (album), a 1993 album by David Grisman
 - Common Chord (organization), nonprofit community music organization in Davenport, Iowa