Niehaus
- Bernd H. Niehaus Quesada
- Bremen (state)
- Canada
- Carl Niehaus
- Charles Henry Niehaus
- Dave Niehaus
- Dick Niehaus
- Ed Niehaus
- Edward F. Niehaus House
- Frank Niehaus
- Free State (province)
- Germany
- High German
- Illinois
- Indiana
- Iowa
- Joseph T. Niehaus, Sr.
- Jutta Niehaus
- Kentucky
- Lennie Niehaus
- Low German
- Lower Saxony
- Minnesota
- Missouri
- Mpumalanga
- Nebraska
- Neuhaus (surname)
- Niehues
- North Rhine-Westphalia
- North West (South African province)
- Ohio
- Rena Niehaus
- Ruth Niehaus
- South Africa
- South Dakota
- Steve Niehaus
- Tom Niehaus
- United States
- Valerie Niehaus
- West Virginia
- Western Cape
- Westphalian language
- Wisconsin