蒂龙郡 （County Tyrone；爱尔兰语：Contae Thír Eoghain；**：泰隆郡），是爱尔兰阿尔斯特省的一个郡，位于北爱尔兰中西部。面积3,155 km²，郡治奥马。1973年以后被分为四个区。

County Tyrone (from Irish:Tír Eoghain, meaning "land of Eoghan") is one of the six counties of Northern Ireland. Adjoined to the south-west shore of Lough Neagh, the county covers an area of 3,155 km² (1218 sq mi) and has a population of about 177,986, with its county town being Omagh. It is also one of the thirty-two traditional counties of Ireland and is within the historic province of Ulster.