Xi Cygni is a binary star system in the constellation Cygnus. Its name is a Bayer designation that is Latinized from ξ Cygni and abbreviated Xi Cyg or ξ Cyg. The pair have a combined apparent visual magnitude of 3.73, making it readily visible to the naked eye as a point of light. Based on parallax measurements, the system is located at a distance of . At this distance, the apparent magnitude is diminished by 0.16 magnitudes from interstellar dust.
This spectroscopic binary system contains two stars which orbit every 18 years in a moderately eccentric orbit. The primary star is a supergiant with a spectral type of around K4, while the secondary is an A-type main-sequence star with a spectral type of A1.5. Stellar winds from the supergiant have been measured at around 50 km/s, but with variations in speed and individual line strengths.
ξ Cygni is in the Kepler spacecraft's field of view but no planets have been detected.
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