U30

U30 may refer to:

Naval vessels

 * GERMAN SUBMARINE U-30, various vessels
 * HMS Mermaid (U30), a sloop of the Royal Navy
 * SM U-30, a submarine of the Austro-Hungarian Navy

Other uses

 * Nissan Presage (U30), a Japanese minivan
 * Small ditrigonal icosidodecahedron
 * Small nucleolar RNA SNORD30
 * Temple Bar Airport, in Mohave County, Arizona, United States
 * U-30 Tow Tractor, an aircraft ground handling vehicle