Calen is a small town and locality in Mackay Region, Queensland, Australia. In the 2011 census, Calen had a population of 451 people.
The locality of Calen is loosely bounded by One Mile Creek to the south and Blackrock Creek to the north. The land is mostly flat and used for sugar cane farming, apart from some undeveloped mountains across the western boundary of the locality and some small undeveloped hill land in the east.
The Bruce Highway passes from the south-east to the north-west of the locality. The North Coast railway line runs immediately north and parallel to the highway.
The town of Calen is located on the south-eastern of the locality with the highway and railway passing through it. The Calen railway station is located in the town.
A second town of Kolijo is located on the south-eastern edge of the locality, again with the highway and railway passing through it. Calen and Kolijo are separated by St Helens Creek, which might explain the development of two towns less than 1.5 kilometres (0.93 mi) apart.