Third party may refer to: Business Third-party source, a supplier company not owned by the buyer or seller Third-party beneficiary, a person who could sue on a contract, despite not being an active party Third-party insurance, such as a Vehicle insurance Politics Third party (politics), any party contending for votes that failed to outpoll either of its two strongest rivals Third party (United States), a US political term for parties other than the Democrats or Republicans Third party (SIPO), in Ireland, those who receive political donations but do not run for election Arts and entertainment 3rd Party, a 1990s American music group Third Party (album), by Blue Sky Black Death and Alexander Chen, 2010 Third Party (DJs), a British DJ duo The Third Party, a 2016 Filipino romantic comedy drama film See also Third person (disambiguation) 3P (disambiguation)