| U.S.'s most abundant energy source | 38 |
| U.S.'s largest S&L until its 2008 collapse | 50 |
| U.S. _____ | 10 |
| U.S. ___, known in New Hampshire as the Daniel Webster Highway | 62 |
| U.S. ___ | 8 |
| U.S. __ | 7 |
| U.S. youth org. | 15 |
| U.S. youth agency: 1935–43 | 33 |
| U.S. writer: 1871–1945 | 29 |
| U.S. writer-anthropologist | 26 |
| U.S. writer Paul | 16 |
| U.S. writer James et al. | 24 |
| U.S. writer Dalton ___ | 22 |
| U.S. writer and lecturer | 24 |
| U.S. writer ("The Black Camel") | 41 |
| U.S. writer | 11 |
| U.S. World Heritage site | 24 |
| U.S. workplace watchdog | 23 |
| U.S. women's singles champion: 1979 and 1981 | 48 |
| U.S. Women's Open org. | 26 |
| U.S. Women's National Soccer Team star Krieger | 50 |
| U.S. women's national soccer team captain 2000-04 | 53 |
| U.S. woman since 1920 | 21 |
| U.S. wine valley | 16 |
| U.S. wellness org. | 18 |
| U.S. weather satellite | 22 |
| U.S. weapons system | 19 |
| U.S. watershed | 14 |
| U.S. watercolorist: 1870–1953 | 36 |
| U.S. watchdog agcy. | 19 |
| U.S. warship in 1989 news | 25 |
| U.S. warning system | 19 |
| U.S. W.W. II rifles | 19 |
| U.S. voters since 1920 | 22 |
| U.S. voter | 10 |
| U.S. visitor since 1976 | 23 |
| U.S. visa type issued to visiting diplomats | 43 |
| U.S. Virgin Is., e.g. | 21 |
| U.S. violinist | 14 |
| U.S. victory site of 1945 | 25 |
| U.S. Vice President: 1933–41 | 35 |
| U.S. Vice President: 1925–29 | 35 |
| U.S. Vice President: 1845–49 | 35 |
| U.S. Vice President or Presidential candidate | 45 |
| U.S. vice president Barkley | 27 |
| U.S. vice president 1801-1805 | 29 |
| U.S. verse writer | 17 |
| U.S. veep, once | 15 |
| U.S. vaccine authority | 22 |
| U.S. V.I., e.g. | 15 |
| U.S. United Nations representative, 2005-06 | 43 |
| U.S. unit of weight equivalent to 100 pounds | 44 |
| U.S. unit | 9 |
| U.S. union, founded 1935 | 24 |
| U.S. undercover outfit | 22 |
| U.S. uncle's "Friday the 13th" character, to a German yes-man? | 76 |
| U.S. uncle | 10 |
| U.S. truck maker until the early '50s | 41 |
| U.S. troops | 11 |
| U.S. Triple Crown winner of 1935 | 32 |
| U.S. treaty ratifier | 20 |
| U.S. Treasury sleuths | 21 |
| U.S. Treasury Dept. agcy. | 25 |
| U.S. Treasury agents | 20 |
| U.S. Treasury agent | 19 |
| U.S. Treasurer Rosie | 20 |
| U.S. transit system that spans two states and a district | 56 |
| U.S. trading place | 18 |
| U.S. trading partner, formerly | 30 |
| U.S. trading partner | 20 |
| U.S. trade laws of 1800's | 29 |
| U.S. time zone | 14 |
| U.S. time division | 18 |
| U.S. threat level at airports | 29 |
| U.S. territory until 1889 | 25 |
| U.S. territory that's now two states | 40 |
| U.S. territory in W.W. II fighting | 34 |
| U.S. territory in the Pacific | 29 |
| U.S. territory divided in 1889 | 30 |
| U.S. territory | 14 |
| U.S. terr., 1861-89 | 19 |
| U.S. terr., 1861-'89 | 24 |
| U.S. terr until 1912 | 20 |
| U.S. term for a British "saloon" | 42 |
| U.S. tennis star barred from South Africa | 41 |
| U.S. tennis pro | 15 |
| U.S. tennis player Oudin | 24 |
| U.S. tennis man | 15 |
| U.S. tennis legend on a 37¢ stamp | 36 |
| U.S. tennis great | 17 |
| U.S. tennis champ: 1977 | 23 |
| U.S. tennis champ: 1937 | 23 |
| U.S. tender | 11 |
| U.S. taxpayer's dread | 25 |
| U.S. tax agency | 15 |
| U.S. talent | 11 |
| U.S. symbols | 12 |
| U.S. symbol | 11 |
| U.S. swimming star Janet | 24 |
| U.S. Surgeon General under Reagan | 33 |