The 25th Boston Society of Film Critics Awards, honoring the best in filmmaking in 2004, were given on 13 December 2004.

• Best Film:
  • Sideways
  • Runner-up: Before Sunset
• Best Actor:
  • Jamie Foxx – Ray
  • Runner-up: Paul Giamatti – Sideways
• Best Actress:
  • Hilary Swank – Million Dollar Baby
  • Runner-up (TIE): Annette Bening – Being Julia and Kim Basinger – The Door in the Floor
• Best Supporting Actor:
  • Thomas Haden Church – Sideways
  • Runner-up: Clive Owen – Closer
• Best Supporting Actress (TIE):
  • Laura Dern – We Don't Live Here Anymore
  • Sharon Warren – Ray
  • Runner-up: Cate Blanchett – The Aviator
• Best Director:
  • Zhang Yimou – House of Flying Daggers (Shi mian mai fu)
  • Runner-up: Alexander Payne – Sideways
• Best Screenplay:
  • Alexander Payne and Jim Taylor – Sideways
  • Runner-up: Charlie Kaufman – Eternal Sunshine of the Spotless Mind
• Best Cinematography:
  • Zhao Xiaoding – House of Flying Daggers (Shi mian mai fu)
  • Runner-up: Bruno Delbonnel – A Very Long Engagement (Un long dimanche de fiançailles)
• Best Documentary:
  • Control Room
  • Runner-up: Touching the Void
• Best Foreign-Language Film:
  • House of Flying Daggers (Shi mian mai fu) • China/Hong Kong
  • Runner-up: A Very Long Engagement (Un long dimanche de fiançailles) • France/United States
• Best New Filmmaker:
  • Jonathan Caouette – Tarnation
  • Runner-up (TIE): Nicole Kassell – The Woodsman and Joshua Marston – Maria Full of Grace
• Best Ensemble Cast:
  • Sideways
  • Runner-up: The Life Aquatic with Steve Zissou

• Past Winners

• Boston film critics flip for ‘Sideways’ Variety
• BOSTON CRITICS NAME `SIDEWAYS' BEST FILM^{[permanent dead link]} Boston Globe
• Boston Film Critics moviecitynews