Zeta Cygni (ζ Cyg) is a binary star system in the northern constellation of Cygnus, the swan.

It has an apparent visual magnitude of 3.26 and, based upon parallax measurements, is about 143 light-years (44 parsecs) away.

The primary component, ζ Cyg A is a giant star with a spectral type of G8 IIIp.

Its most likely status is as a red clump giant, an evolved star that has begun core helium fusion.

These elements were synthesized by the other member of the system as it passed through the asymptotic giant branch (AGB) stage of its evolution, then ejected in its stellar wind and accreted onto the current primary component.