Ennistymon House, Georgian manor in Ennistymon, Ireland.

Ennistymon House is a stone building located on elevated ground near the Cullenagh River in a small Irish village. The structure faces east toward local waterfalls and overlooks the countryside beyond.

The O'Briens of Thomond acquired the castle here in 1564, known as the "middle house" between their seats at Dough and Glann. Edward O'Brien demolished much of it in 1754 and built a two-storey Georgian house with seven bays and a pedimented breakfront. Francis Macnamara added a west wing in 1863.

The house became the local station of the newly established Garda Síochána after Henry Valentine Macnamara left for London in 1922. His son Francis and his third wife Iris O'Callaghan-Westropp regained possession in the 1930s and converted it into the Falls Hotel. The hotel was run in the 1940s by Brendan O'Regan, later instrumental in developing Shannon Airport.

The building now operates as a hotel offering private rooms with amenities like free WiFi and television. Its location provides easy access to the village and nearby waterfalls.

In 1959 John F. Wood and his wife Bridget added a 30-kWh hydroelectric plant to the hotel, using the Cullenagh River to power the building. The system was installed by the owners who had bought the property in 1955.