• a boat, ship or starship
• liquid or food vessel, such as a pitcher, bowl, cup or bottle
• other kinds of packaging containers
• a tubular structure of vascular tissue in plants such as xylem and phloem

Vessel may also refer to:

• Blood vessel, a part of the circulatory system and function to transport blood throughout the body
• Lymph vessel, a thin walled, valved structure that carries lymph
• Vessel element, a cell type found in xylem
• Pressure vessel, a closed, rigid container designed to hold gases or liquids at a pressure different from the ambient pressure
• Vacuum vessel, a pressure vessel where the pressure inside the vessel is lower than the ambient pressure
• "Vessel (song)", a song by Nine Inch Nails
• Vessel (band), a Black Metal band from California