1955 U.S. National Championships – Men's singles

Tony Trabert defeated Ken Rosewall 9–7, 6–3, 6–3 in the final to win the men's singles tennis title at the 1955 U.S. National Championships.

Seeds
The tournament used two lists of eight players for seeding the men's singles event; one for U.S. players and one for foreign players. Tony Trabert is the champion; others show the round in which they were eliminated.


 * U.S.


 * 1) 🇺🇸 Tony Trabert (champion)
 * 2) 🇺🇸 Vic Seixas (semifinals)
 * 3) 🇺🇸 Ham Richardson (quarterfinals)
 * 4) 🇺🇸 Gilbert Shea (first round)
 * 5) 🇺🇸 Eddie Moylan (fourth round)
 * 6) 🇺🇸 Art Larsen (fourth round)
 * 7) 🇺🇸 Tut Bartzen (quarterfinals)
 * 8) 🇺🇸 Herbie Flam (quarterfinals)


 * Foreign


 * 1) 🇦🇺 Ken Rosewall (finalist)
 * 2) 🇦🇺 Lew Hoad (semifinals)
 * 3)  Kurt Nielsen (third round)
 * 4) 🇦🇺 Rex Hartwig (fourth round)
 * 5) 🇮🇹 Nicola Pietrangeli (third round)
 * 6) 🇦🇷 Enrique Morea (fourth round)
 * 7) 🇦🇺 Neale Fraser (fourth round)
 * 8) 🇯🇵 Kosei Kamo (second round)

Key

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