The term 'County in Northern Ireland' can be summarized by two crossword solutions: Tyrone (6 letters) and Donegal (7 letters). Tyrone is a county in Northern Ireland that borders the Republic of Ireland and is part of the historic province of Ulster. It is the fourth largest county in Northern Ireland and has a population of approximately 150, 000 people. Donegal is also a county in Northern Ireland, located in the northwest of the country. It is the second largest county in Northern Ireland and has a population of approximately 160, 000 people. Both counties are known for their stunning landscapes and rich cultural heritage.