| U.S. air base site in Greenland | 31 |
| U.S. air base in Spain | 22 |
| U.S. air agency | 15 |
| U.S. agricultural agcy. | 23 |
| U.S. agents | 11 |
| U.S. agent: Abbr. | 17 |
| U.S. agent | 10 |
| U.S. agency: Abbr. | 18 |
| U.S. agency: 1933-43 | 20 |
| U.S. agency with a "CryptoKids" program | 49 |
| U.S. agency in the news | 23 |
| U.S. agency est. 1958 | 21 |
| U.S. agency | 11 |
| U.S. agcy.: 1948–51 | 26 |
| U.S. agcy., 1948–51 | 26 |
| U.S. agcy. since 1958 | 21 |
| U.S. agcy. since 1933 | 21 |
| U.S. agcy. for senior citizens | 30 |
| U.S. adversary in 1812 | 22 |
| U.S. admiral: 1837–1917 | 30 |
| U.S. admiral of W. W. I | 23 |
| U.S. admiral of 1898 | 20 |
| U.S. actress: 1865-1932 | 23 |
| U.S. accident investigator | 26 |
| U.S. abolitionist: 1805-79 | 26 |
| U.S. 66, for one | 16 |
| U.S. 66 and I-95 | 16 |
| U.S. 41 in part | 16 |
| U.S. 36 crosses it | 18 |
| U.S. 101, for one | 17 |
| U.S. 101, e.g.: Abbr. | 21 |
| U.S. 101, e.g. (Abbr.) | 22 |
| U.S. 101 locale: Abbr. | 22 |
| U.S. 1, for one: Abbr. | 22 |
| U.S. 1, for one | 15 |
| U.S. 1, etc. | 12 |
| U.S. 1, e.g. | 12 |
| U.S. 1's northern terminus | 30 |
| U.S. 1 is one | 13 |
| U.S. 1 and U.S. 66 | 18 |
| U.S. 1 and others: Abbr. | 24 |
| U.S. 1 and others | 17 |
| U.S. 1 and I 95 | 15 |
| U.S. "Big Brother" host | 33 |
| U.S. "ashcan" painter | 31 |
| U.S. 'Uncle' | 20 |
| U.S. 'Ltd.' | 19 |
| U.S. ''Star Wars'' plan | 39 |
| U.S. $10 coin, until 1933 | 25 |
| U.S. | 4 |
| U.R.L. start | 12 |
| U.R.L. part | 11 |
| U.R.L. opener indicating an additional layer of encryption | 58 |
| U.R.L. lead-in | 14 |
| U.R.L. ending that's not "com" or "gov" | 63 |
| U.R.L. ending | 13 |
| U.R.L. ender | 12 |
| U.P.S., say | 11 |
| U.P.S.'ed | 13 |
| U.P.S. unit: Abbr. | 18 |
| U.P.S. unit | 11 |
| U.P.S. supply | 13 |
| U.P.S. staffer, at times | 24 |
| U.P.S. rival | 12 |
| U.P.S. option | 13 |
| U.P.S. inquiry | 14 |
| U.P.S. drivers have them | 24 |
| U.P.S. driver's assignment | 30 |
| U.P.S. driver assignments: Abbr. | 32 |
| U.P.S. delivery: Abbr. | 22 |
| U.P.S. delivery | 15 |
| U.P.S. deliveries: Abbr. | 24 |
| U.P.S. customer | 15 |
| U.P.S. cargo: Abbr. | 19 |
| U.P.S. alternative | 18 |
| U.P. and B.& O. | 19 |
| U.N.R.R.A. successor | 20 |
| U.N.H.C.R. assists them | 23 |
| U.N.figure: 1959 | 16 |
| U.N.C.'s athletic org. | 26 |
| U.N.C. is in it | 15 |
| U.N.C. Charlotte's athletic conf. | 37 |
| U.N.C. athletic grp. | 20 |
| U.N.C. and U.Va. grp. | 21 |
| U.N.-recognized grp. since 1974 | 31 |
| U.N.-like | 9 |
| U.N.-created land: Abbr. | 24 |
| U.N.'s U ___ | 16 |
| U.N.'s Trygve and kin | 25 |
| U.N.'s main deliberative organ | 34 |
| U.N.'s main deliberative body | 33 |
| U.N.'s labor org. | 21 |
| U.N.'s Kofi | 15 |
| U.N.'s home | 15 |
| U.N.'s Hammarskjold | 23 |
| U.N. working-conditions agency | 30 |
| U.N. working-conditions agcy. | 29 |
| U.N. working conditions agency | 30 |
| U.N. workers' rights grp. | 29 |
| U.N. workers' rights group | 30 |