Leiocottus hirundo, the lavender sculpin, is a species of sculpin, a nearshore benthic fish native to the eastern Pacific Ocean. It is found from southern California, United States to northern Baja California, Mexico. It lives from inshore waters to a depth of around 37 metres (121 ft). This species grows to a length of 25 centimetres (9.8 in) TL. Leiocottus hirundo is the only member of its genus. However, phylogenetically it falls within the diversity of the genus Clinocottus. It is a sister taxon to Clinocottus analis.