Sudbury Micro-Neutron Observatory
- Country: Canada
- Type: Science
- Website: www.snolab.ca
- Update: 05-02
The Sudbury Micro Neutron Observatory Laboratory (SNOLAB, SNO Lab) is an underground physics laboratory in Sudbury, Canada, located 2,100 meters below ground in a nickel mine, making it one of the deepest underground laboratories in the world.