Northern lamprey is a common name that may refer to:
*
Petromyzontidae
Petromyzontidae are a family of lampreys native to the Northern Hemisphere, comprising the vast majority of living lampreys. Petromyzontids have the highest number of chromosomes (164–174) among vertebrates.
Genera
* '' Caspiomyzon''
* '' En ...
, the family that includes all lampreys native to the northern hemisphere
**''
Ichthyomyzon unicuspis'', a species of lamprey native to North America
{{Disambiguation, fish