V81 may refer to :

• the serial number of an Ariane 4 launch in 1995 that put the Telecom 2C and Insat 2C satellites into orbit
• SMS V81, a 1916 torpedo boat built by German AG Vulcan Stettin shipbuilding company

• 1884 in anthropology
• 1884 in archaeology
• 1884 in art
• 1884 in association football
• 1884 in Australia
• 1884 in baseball
• 1884 in film
• 1884 in Ireland
• 1884 in Mexico
• 1884 in New Zealand
• 1884 in poetry
• 1884 in sociology
• 1884 in television
• 1884 in the UK
• 1884 in the United Kingdom
• 1884 in Wales
• 1884 New York Gothams season
• 1884 Penn State Nittany Lions football team
• 1884 Philadelphia Quakers season
• 1884 Pittsburgh Alleghenys season
• 1884 South Carolina gubernatorial election
• 1884 St. Louis Browns season
• 1884 St. Louis Cardinals season
• 1884 U.S. National Championships
• 1884 U.S. National Championships (tennis)