NGC 504, also occasionally referred to as PGC 5084 or UGC 935, is a lenticular galaxy located approximately 189 million light-years from the Solar System[4] in the constellation Pisces.

[5] Herschel discovered the object without recording a visual description.

However, he noted the nebula "precedes NGC 507 by about 10 seconds and is half a field to the south of it".

NGC 504 was later also independently discovered by Heinrich d'Arrest, using an 11" reflecting telescope in Copenhagen and assuming the object was new.

[6] The objects were later combined by John Louis Emil Dreyer with the creation of the New General Catalogue, in which the galaxy was described as "very faint, small".