Coulson is a locality in the Scenic Rim Region of south-east Queensland, Australia. At the 2011 census, Roadvale and the surrounding area had a population of 254. It is positioned on the main road linking Boonah, Queensland with both Beaudesert and Ipswich. Coulson is crossed by Teviot Brook, a tributary of the Logan River at the southern end of the Teviot Range. Part of the southern boundary follows Sandy Creek and includes the elevated slopes of Groans Hill.
Much of the land is used for agricultural purposes. Coulson State School operated from 1881 to 1993.