Portballintrae (from Irish: Port Bhaile an Trá, meaning "port of the beach settlement") is a small seaside village in County Antrim, Northern Ireland. It is four miles east of Portrush and two miles west of the Giant's Causeway. In the 2001 Census it had a population of 734 people, a decline of 10% compared to 1991. It lies within the Coleraine Borough Council area.
Portballintrae was originally a fishing village; a cluster of whitewashed cottages nestled around the horse shoe-shaped Ballintrae Bay. Many of its earlier buildings have been restored and maintained. The original village houses were built in a line along the seashore and many old cottages still stand on the shore. Portballintrae has undergone fast growth since the 1970s. However, there has been a steady change in its character, with almost all the recent dwellings completed acquired as second homes, and a considerable proportion of the older housing changing also to second homes. Considerably less than half of the dwellings in the village remain as permanent residences. House prices are high; a modest three bedroom bungalow would be expected to realise anything up to £300,000, those with sea views realise considerably more than this. It is thought that the majority of the housing and development issues were caused by overzealous local developers. In the summer of 2009, a new village hall was constructed by the sea-front car park complete with conference suite, IT facilities and a newsagents.