RRRR

RRRR may refer to:

• the reporting mark for the Rock and Rail LLC
• Raritan River Railroad
• the morse code for surface raider, used in conjunction with SOS

See also

• R (disambiguation)
• RR (disambiguation)
• RRR (disambiguation)
• R4 (disambiguation)
• 4R (disambiguation)
• RRRrrrr!!!, a 2004 French comedy film