Class 1 may refer to:

• Class 1, in the electrical Appliance classes
• Laser Safety Class 1
• Class 1 Touring Cars was an FIA classification for cars in motor racing, as used in the Deutsche Tourenwagen Meisterschaft (DTM) from 1993 to 1995
• Class 1, a contribution class in the National Insurance system in the UK.
• Class I railroad is a term used in North American railroad size classification
• Classes of U.S. Senators
• NSB El 1, an electric locomotive of Norway
• NSB Di 1, a diesel locomotive of Norway
• The first class in terms of hiking difficulty in the Yosemite Decimal System
• Class 1 World Powerboat Championship

• Four to the Floor (TV series)
• Four Town
• Four Town Lake
• Four Towns
• Four-track
• Four Tracks: LA and Back
• Four-track tape
• Four Treasures of the Tuatha De Danann
• Four Troublesome Heads
• Fourtunate
• FOURtv
• Four Two Ka One
• FourTwoNine
• Fourt-Woodlock equation
• Four % Universe
• Four Until Late
• Four Upbuilding Discourses, 1844
• Four-verse stanza
• Four vertex theorem
• Four virtues
• Four-voice texture
• Four-volume
• Four Walls and a Roof
• Four Walls and a Roof (The Walking Dead)
• Four Walls (Broods song)