Parish and village on the east coast of the Isle of Man, immediately north of Douglas.

Robertson described Kirk Onchan as one of the smallest parishes on the Island, bounded by Lonan, Braddan and the sea. The village of Kiondroghad, which he translated as Bridge-end, stood about two miles from Douglas on the road north towards Ramsey by Laxey. The parish's creeks included Crowdale, Bankes Harbour, Port Cooyn and Port y Artay. Barley and oats were the prevailing crops, and Robertson noted four corn mills within the parish.

The parish contains a number of prehistoric remains. On the quarterland of Ballachrink a ruined stone monument was described with a circle of stones around its base. About a hundred yards to the west stood an associated tumulus, with traces of a circular enclosure nearby. At nearby Ballacottier another cairn was noted, composed largely of stones which appeared to have been exposed to fire.

A gold noble of Edward III was found at Slegaby in Onchan. Nineteenth-century writers placed it among a number of significant coin finds on the Island, alongside discoveries from Bradda Head and other sites.

Onchan also retained a strong body of folklore. One account recorded the belief that fairies rode horses at night, leaving them wet with perspiration by morning. In the village itself a phantom carriage was said to pass rapidly through at night, though however carefully people watched for it no one could see it.

The parish grew rapidly as Douglas expanded northwards in the nineteenth and twentieth centuries, but the older settlement remained centred on the route between Douglas and Laxey.