Kepler-304 is an orange K-type dwarf (about 0.80 solar masses, 4,817 K, 0.73 solar radii), 435 light-years from Earth. Kepler-304 b is a planet with 2.9 Earth radii, with an orbital period of 3.3 days, at 0.039 AU from its star, discovered in 2014 via transit. Kepler-304 c is a planet with 2.2 Earth radii, with an orbital period of 5.3 days, at 0.054 AU from its star, discovered in 2014 via transit. Kepler-304 d is a planet with 2.8 Earth radii, with an orbital period of 9.7 days, at 0.080 AU from its star, discovered in 2014 via transit.