Petter is a common Scandinavian firstname. It may refer to:
People:
- Petter (rapper) (full name Petter Askergren), a Swedish rap musician
- Petter Dass, a poet and hymn writer
- Petter Hansson, a Swedish footballer
- W. E. W. Petter, English aircraft designer
- Petter Rudi, a Norwegian footballer
- Gonzalo Rocha, an Uruguayan footballer, full name Petter Gonzalo Rocha Lavandeira
- Petter Northug, a Norwegian cross country skier
- Tom Petters, former CEO and chairman of Petters Group Worldwide
- Petter Stenborg, Swedish actor and theatre director
- Petter Sivlér, Swedish scientist.
In business:
- Lister Petter, a British manufacturer of internal combustion engines
- Petters Limited, a former manufacturer of internal combustion engines, and one of Lister Petter's predecessors
- Petters Group Worldwide, a diversified company headquartered in Minnetonka, Minnesota