Kepler-306 is an orange K-type dwarf (about 0.75 solar masses, 4,954 K, 0.72 solar radii), 776 light-years from Earth. Kepler-306 b is a planet with 1.5 Earth radii, with an orbital period of 4.6 days, at 0.050 AU from its star, discovered in 2014 via transit. Kepler-306 c is a planet with 2.4 Earth radii, with an orbital period of 7.2 days, at 0.067 AU from its star, discovered in 2014 via transit. Kepler-306 d is a planet with 2.5 Earth radii, with an orbital period of 17.3 days, at 0.120 AU from its star, discovered in 2014 via transit.