W Cygni is a semi-regular variable star in the constellation Cygnus, located 570 light-years from Earth.

W Cygni is, at times, a naked eye star but it was not given a Bayer or Flamsteed designation.

It has been proposed as a binary star system with a hotter main sequence companion, but this has not been confirmed.

[9] W Cygni was discovered to be variable by John Ellard Gore, and first published in 1885.

[8] There is some evidence of additional very slow and small variations in the light curve on a time scale of 3,000–5,000 days.