Llanfihangel Nant Bran is a small village lying next to the Nant Bran river in Powys, Wales about 7.5 miles (12 km) west of Brecon.
It is largely a farming community. Llanfihangel includes a church, dedicated to St. Michael, which was probably built in the 16th century and was substantially reconstructed in 1882.
Bethel Chapel was built between 1810 and 1811, and later rebuilt or modified between 1865 and 1866. It is in the simple round-headed style, of the long-wall entry type. The walls are rendered and whitewashed, with a slate eaved roof above. The windows are small-paned sashes with intersecting tracery in their heads. The interior of the chapel was gutted in 2000.
For elections to Powys County Council, Llanfihangel Nant Bran is part of the Yscir electoral ward.