The Londonderry Irish County Tartan is a distinctive tartan design linked to Londonderry, the Irish county, Londonderry, and is sometimes referred to by the name of County Derry. The pattern is an extensive history dating back several centuries ago and has been a significant element of the culture of the residents of Londonderry. The precise origins of the Londonderry Irish County Tartan are unknown, however, it is believed that it originated during the late 19th century to serve as an emblem of the country's cultural heritage.
Derry the name given to the town is an abbreviated variant of the original Irish "Diary" which means an oak grove, or a wood. It is situated within The Province of Ulster. The Cianachta is the most significant group of the O'Connors of Glengiven (Glinne-Geimhin) situated within The Roe Valley, which had maintained their position for several years prior to the advent of Ua Cathain beginning about 1138. A significant portion of County Derry was then referred to as Tir Cahan, or Cathan-night as a reference to the nation of O'Kanes. The Londonderry Irish County Tartan was worn by the inhabitants of Londonderry to symbolize their identity as a cultural group. An important aspect of the history of the inhabitants of Londonderry and is proudly worn by many around the globe as a sign of their relationship to their culture and their heritage.