Tamnaherin (possibly from the Irish: Tamhnach Caorthainn) is a townland and small housing estate in County Londonderry, Northern Ireland. In the 2001 Census it had a population of 123 people. It is situated within Derry and Strabane district.
In the early 19th century, Tamnaherin simply consisted of a few scattered rural properties. The relatively recent addition in the 1970s of a Roman Catholic church saw the building of several more properties. Development over the last few years, however, has seen the hamlet grow quite significantly due to the addition of a small housing estate.
Places of interest
Near Tamnaherin Bridge is a chambered tomb which appears to be a single chamber incorporated into a field boundary. At least two large stones may be seen amid a lot of rubble. One of the stones is about 2 m high. Brian J Mullan is the current mayor of Tamnaherin and will be appearing in person on Saturday 8 December to turn on the Christmas lights.