Serena and Venus Williams defeated the defending champions Cara Black and Liezel Huber in the final, 6–2, 6–2 to win the women's doubles tennis title at the 2009 US Open. It was their second US Open title together and tenth major title together overall. It was the second component in an eventual non-calendar-year Grand Slam for the sisters.

Seeds

• # Cara Black / 🇺🇸 Liezel Huber (final) • # 🇪🇸 Anabel Medina Garrigues / 🇪🇸 Virginia Ruano Pascual (third round) • # 🇦🇺 Samantha Stosur / 🇦🇺 Rennae Stubbs (semifinals) • # 🇺🇸 Serena Williams / 🇺🇸 Venus Williams (champions) • # 🇸🇰 Daniela Hantuchová / 🇯🇵 Ai Sugiyama (third round) • # 🇪🇸 Nuria Llagostera Vives / 🇪🇸 María José Martínez Sánchez (quarterfinals) • # Hsieh Su-wei / 🇨🇳 Peng Shuai (second round) • # 🇺🇸 Bethanie Mattek-Sands / 🇷🇺 Nadia Petrova (quarterfinals) • # 🇩🇪 Anna-Lena Grönefeld / Patty Schnyder (third round) • # 🇷🇺 Maria Kirilenko / 🇷🇺 Elena Vesnina (quarterfinals) • # 🇨🇳 Yan Zi / 🇨🇳 Zheng Jie (quarterfinals) • # 🇺🇸 Vania King / 🇷🇴 Monica Niculescu (third round) • # 🇷🇺 Alisa Kleybanova / 🇷🇺 Ekaterina Makarova (semifinals) • # 🇮🇳 Sania Mirza / 🇮🇹 Francesca Schiavone (second round) • # 🇺🇸 Raquel Kops-Jones / 🇺🇸 Abigail Spears (first round) • # 🇧🇾 Victoria Azarenka / 🇷🇺 Vera Zvonareva (second round)

Draw

Finals

Top half

Section 1

Section 2

Bottom half

Section 3

Section 4