Lopp may refer to:

• Michael Lopp, represented by the character Rands in the webcomic Jerkcity

• William Thomas Lopp, pioneer missionary in Alaska around the end of the 19th century, active in Native American affairs in the United States

• Lopp Lagoon, body of water in Alaska named after William Thomas Lopp

See also

• LOPP, Polish language acronym for the Airborne and Antigas Defence League in the early to mid 20th century