A field galaxy is a galaxy that does not belong to a larger cluster of galaxies and hence is gravitationally alone.
Roughly 80% of all galaxies located within 5 Mpc (16 Mly) of the Milky Way in groups or clusters of galaxies. Most low-surface-brightness galaxies are field galaxies. The median Hubble-type of field galaxies is Sb, a type of spiral galaxy.
List of field galaxies
A list of nearby relatively bright field galaxies within the Local Volume, about 10 Mpc (33 Mly)
References
Field galaxy Wikipedia(Text) CC BY-SA