Altona may refer to:
- Altona, Hamburg, borough of Hamburg, Germany
- Altona, Illinois, United States
- Altona, Indiana, United States
- Altona, Manitoba, Canada
- Altona, Missouri, U.S.
- Altona, Nebraska, U.S.
- Altona, New York, a town located in Clinton County
- Altona (CDP), New York, a census-designated place within the Town of Altona
- Altona, Ontario, Canada
- Altona, original name of New Holstein, Wisconsin
- Altona, Saint Croix, United States Virgin Islands
- Altona, Saint Thomas, United States Virgin Islands
- Altonah, Utah, United States; also spelled Altona
- Altona, Victoria, a suburb of Melbourne, Australia
- Altona, a district of Eldena in Mecklenburg, Germany
- 850 Altona, a minor planet in the Solar System
- Altona Christian Community, a Hutterite community in Henderson, Minnesota
- Altona (sternwheeler), a steamboat that operated on the Willamette River in Oregon, U.S.
- "Altona", the oldest tavern in Bergen, Norway
- Altona (West Virginia), a historic farm near Charles Town
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