Mustassaare is a village in Võru Parish, Võru County, in southeastern Estonia.

It is located just southwest of Sõmerpalu, the administrative centre of the municipality.

[1] Mustassaare has a station on currently inactive Valga–Pechory railway.

The southeastern part of Mustassaare village territory is occupied by Nursipalu training area used by the Estonian Defence Forces.

This Võru County location article is a stub.