is a surname, and may refer to:
Plimsoll may also refer to:
- the plimsoll symbol ⦵ (or
o) that is used as a superscript in the notation of thermodynamics to indicate an arbitrarily chosen non-zero reference point ("standard state").
- Plimsoll line or Plimsoll mark on a ship's hull, named after Samuel Plimsoll
- Plimsoll shoe, which is named for the shoe's horizontal lines, which resemble the Plimsoll line