1956 U.S. National Championships – Men's singles

Ken Rosewall defeated Lew Hoad 4–6, 6–2, 6–3, 6–3 in the final to win the men's singles tennis title at the 1956 U.S. National Championships. Hoad was attempting to complete the Grand Slam.

Seeds
The seeded players are listed below. Ken Rosewall is the champion; others show the round in which they were eliminated.


 * 1) 🇦🇺 Lew Hoad (finalist)
 * 2) 🇦🇺 Ken Rosewall (champion)
 * 3) 🇺🇸 Ham Richardson (quarterfinals)
 * 4) 🇺🇸 Vic Seixas (semifinals)
 * 5) 🇦🇺 Neale Fraser (semifinals)
 * 6) 🇦🇺 Ashley Cooper (quarterfinals)
 * 7) 🇸🇪 Ulf Schmidt (third round)
 * 8) 🇺🇸 Dick Savitt (quarterfinals)

Key

 * Q = Qualifier
 * WC = Wild card
 * LL = Lucky loser
 * r = Retired