Tarmonbarry (officially Termonbarry) is a small village in County Roscommon, sitting close to the junction of the Cloondara Canal and the River Shannon.

It is a recognized stopping point on the Upper Shannon, with public mooring available either between the bridge and the lock or downstream of the lock, both within easy walking distance of the village.

Access along this stretch of the river is managed by a lifting bridge above and a lock below.

The village itself offers a handful of pubs and a small supermarket, and the larger town of Longford lies roughly five miles to the east with a full range of services.