Bon-y-maen, sometimes spelt Bonymaen, (Welsh: Bôn-y-maen) is a community in Swansea, Wales located about 1.5 miles (2.4 km) north east of Swansea city centre.

It falls within the coterminous Bonymaen ward for elections to Swansea Council.

Overlooking Bon-y-maen on top of Kilvey Hill is the main TV transmitter for Swansea.

The local rugby team is Bonymaen RFC.

In 2017 over 200 new homes were planned for the ex-Morris Brothers bus works in Pentrechwyth (part of Bonymaen).