U30
U30 may refer to:

Naval vessels 
 , various vessels
 , a sloop of the Royal Navy
 , 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