Rancho Punta de los Reyes Sobrante was a 48,189-acre (195.01 km2) Mexican land grant in present-day western Marin County, California, given by Governor Manuel Micheltorena in 1843 to Antonio Maria Osio. The name means "Leftover of Point Reyes Ranch". It comprised much of what is now western Marin County and the Point Reyes National Seashore.