Mountfield (Irish: Achadh Ard) is a small village in County Tyrone, Northern Ireland. It is within the townland of Aghalane, northeast of Omagh. It lies on the A505 road and had a population of 903 in the 2021 Census.^{[citation needed]} It is set in a stretch of undulating countryside and is regarded as a gateway to the Sperrin Mountains.^[1]

The village was developed mainly in the 19th century by Sir William McMahon and today is a quiet, tranquil place with its economy dependent on agriculture.

Mountfield is part of the Fermanagh and Omagh District Council area.

Mountfield is the home of Mountfield F.C. Set up 2014, Mountfield is the home of Sperrin Óg Ladies Gaelic Football Club.

• NI Neighbourhood Information Service
• Omagh District Council

• List of towns and villages in Northern Ireland