Alna is a borough of the city of Oslo, Norway. It is named after the river Alna.
The borough consists of the following neighborhoods:
Alna can refer to:
- Alna, a borough of Oslo, Norway
- Alnaelva, a river in Oslo
- Łyna (river) (called Alna in Lithuanian), a river in Poland and the Kaliningrad Oblast of Russia
- Alna Sharyo, a Japanese rollingstock and tram manufacturer.
- Alna, Maine, in the United States
- Alna, brand name of Boehringer Ingelheim for active ingredient Tamsulosin