U20

U20 or U-20 may refer to:

Naval vessels

, a sloop of the Royal Navy , a submarine of the Austro-Hungarian Navy

Other uses Great truncated cuboctahedron Meizu U20, a smartphone Roland U-20, a synthesizer Small nucleolar RNA SNORD20 U20 summit, an international summit for cities from the G-20 countries Under-20 athletics Uppland Runic Inscription 20