Ustya (Russian: Устья) is an alternative name of several rural localities in Moscow Oblast, Russia:
- Ustya, alternative name of Ust-Pristan, a village in Bolsherogachevskoye Rural Settlement of Dmitrovsky District; 56°30′N 37°7′E / 56.500°N 37.117°E
- Ustya, alternative name of Ustye, a village in Volchenkovskoye Rural Settlement of Naro-Fominsky District; 55°16′N 36°20′E / 55.267°N 36.333°E