John Doeg defeated Frank Shields 10–8, 1–6, 6–4, 16–14 in the final to win the men's singles tennis title at the 1930 U.S. National Championships.

[1] Reigning champion Bill Tilden lost to Doeg in the semifinals.

[2] 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.

John Doeg is the champion; others show the round in which they were eliminated.