Seat can refer to:

A place to sit, particularly the area one sits upon (rather than other elements, like armrests), See:

• Chair
• Car seat
• Airline seat
• Saddle, a type of seat used on the backs of animals, bicycles (see bicycle seat), etc.
• Buttocks, the part of the body on which one sits

A place or office of authority:

• Chair (official), a seat of office, authority, or dignity
• Legislative seat, a membership in a parliament or other legislature
• Seat (legal entity), indicating where the headquarters of the entity are located
• The capital city of an administrative region, such as:
• County seat
• Canton seat
• Clan seat
• Country seat, a place in the country
• Throne, the original seat of authority from which others may be derived
• Seat (territorial-administrative unit) territorial-administrative unit in the medieval Hungarian Kingdom

Other:

• SEAT, a Spanish car manufacturer, now owned by the Volkswagen Group (AG)
• Seat Pagine Gialle, the Italian Yellow Pages group
• SEATS, Signal Extraction in ARIMA Time Series", an Econometric package (Gómez y Maravall, 1996)