Dark spots crossing the stellar disk lead to periodic modulations in stellar light-curves that encode information on surface rotation and magnetic activity. Here, we analyze Kepler long-cadence data (four different time-series) for ~50,000 solar-type main-sequence and subgiant stars cooler than 5500 K and with surface gravity log g larger than 3.5 dex. Surface rotation period estimates are obtained through the implementation of a method which combines a wavelet analysis with the autocorrelation of the light-curve. We obtain reliable rotation periods for 23,494 stars. Only 16,600 of these are common to McQuillan (2013, 2014), with an agreement of ~99% within 2sigma. We also take special care to identify and remove possible polluters, such as classical pulsators, misclassified Red Giants, photometric pollution and other instrumental issues in light-curves.