1900 was a year.
1900 may also refer to:
- 1900 BC, a year
- 1900 (film), a 1976 Italian epic film
- 1900 (magazine), a Dutch bi-monthly sports publication focusing on football club Ajax Amsterdam
- ICT 1900 series, a family of mainframe computers
- Beechcraft 1900, a turboprop regional airliner
- SP1900 EMU, a train in Hong Kong
- 1900, a 2008 album by Caramel Jack
- Fiat 1900, also known as the NSU-Fiat 1900, a passenger car
- Opel 1900, a family car marketed in the United States