A display substrate and a display device including the same are provided. The display substrate includes a first substrate which is divided into a display portion including pixel regions and a non-display portion including a region other than the display portion. Color filters are formed in the pixel regions of the substrate to respective thicknesses. At least one stepped pattern is formed on the non-display portion of the substrate and from the same material as used to form at least one of the color filters. The stepped patterns are formed at an area occupancy density of 20% or more of the non-display portion. A minimum distance is maintained between the stepped patterns and the pixel regions.