Barby may refer to:
- Barby, Ardennes, a village in Grand Est, France
- Barby, Germany, a town in Saxony-Anhalt
- Barby, Northamptonshire, a village in England
- Barby, Savoie, a village in Auvergne-Rhône-Alpes, France
- Bärby, a locality in Uppsala County, Sweden