| U.S. humane org. | 16 |
| U.S. humane org. since 1866 | 27 |
| U.S. humorist | 13 |
| U.S. humorist and family | 24 |
| U.S. humorist Finley Peter ___ | 30 |
| U.S. humorist-journalist: 1833-88 | 33 |
| U.S. humorist: 1850–96 | 29 |
| U.S. hwy | 8 |
| U.S. hwy. | 9 |
| U.S. hwy., e.g. | 15 |
| U.S. hwys., e.g. | 16 |
| U.S. hymnist | 12 |
| U.S. ICBM | 9 |
| U.S. illustrator | 16 |
| U.S. illustrator: 1877–1960 | 34 |
| U.S. immigrant's class | 26 |
| U.S. immigrant's subj. | 26 |
| U.S. immigrants' subj. | 26 |
| U.S. import | 11 |
| U.S. Indian | 11 |
| U.S. Indian tribe | 17 |
| U.S. Indians | 12 |
| U.S. industrialist: 1883-1979 | 29 |
| U.S. inst., New London, Conn. | 29 |
| U.S. intelligence org. | 22 |
| U.S. invasion site of 1983 | 26 |
| U.S. inventor | 13 |
| U.S. inventor Elisha | 20 |
| U.S. inventor Elisha ___ | 24 |
| U.S. inventor Pliny ___ | 23 |
| U.S. inventor-armorer | 21 |
| U.S. inventor: 1847–1922 | 31 |
| U.S. investigators | 18 |
| U.S. investment instrument | 26 |
| U.S. island | 11 |
| U.S. island called "The Gathering Isle" | 49 |
| U.S. island in the Pacific | 26 |
| U.S. island near U.S.S.R. | 25 |
| U.S. island occupied by Japan during W.W. II | 44 |
| U.S. island of entry, once | 26 |
| U.S. Island territory | 21 |
| U.S. Japanese | 13 |
| U.S. jazz pianist | 17 |
| U.S. journalist | 15 |
| U.S. journalist Jacob | 21 |
| U.S. journalist, born in Denmark | 32 |
| U.S. journalist: 1889–1974 | 33 |
| U.S. jurist | 11 |
| U.S. jurist: 1856–1941 | 29 |
| U.S. jutters into the Atlantic | 30 |
| U.S. labor leader | 17 |
| U.S. labor leader Eugene | 24 |
| U.S. labor leader: 1887–1946 | 35 |
| U.S. lake | 9 |
| U.S. landscape painter | 22 |
| U.S. landscape painter: 1825–94 | 38 |
| U.S. lang. | 10 |
| U.S. law group | 14 |
| U.S. leader | 11 |
| U.S. leader acquitted of treason | 32 |
| U.S. leader whose poor eyesight kept him out of the USMA | 56 |
| U.S. legal tender | 17 |
| U.S. legal-defense group | 24 |
| U.S. legislator with a six-yr. term | 35 |
| U.S. legislators | 16 |
| U.S. lexicographer-educator: 1869-1946 | 38 |
| U.S. Library of Medicine maintainer | 35 |
| U.S. literary family | 20 |
| U.S. locale of the International Peace Garden | 45 |
| U.S. locksmith | 14 |
| U.S. mail center | 16 |
| U.S. mail holders | 17 |
| U.S. male? | 10 |
| U.S. marathon runner | 20 |
| U.S. Marine | 11 |
| U.S. Marine Band leader, 1880-92 | 32 |
| U.S. Marine Corps E-6 | 21 |
| U.S. marionette man | 19 |
| U.S. maritime spy agcy. | 23 |
| U.S. marketing org. | 19 |
| U.S. match for Becker | 21 |
| U.S. med. group | 15 |
| U.S. media agency | 17 |
| U.S. media watchdog | 19 |
| U.S. medical research agcy. | 27 |
| U.S. medicine regulator | 23 |
| U.S. mental-hygiene movement founder | 36 |
| U.S. mil. award | 15 |
| U.S. mil. awards | 16 |
| U.S. mil. decorations | 21 |
| U.S. mil. honor | 15 |
| U.S. mil. honors | 16 |
| U.S. mil. medal | 15 |
| U.S. mil. plane | 15 |
| U.S. military award | 19 |
| U.S. military chopper | 21 |
| U.S. military decoration | 24 |
| U.S. military planes | 20 |
| U.S. military vet | 17 |
| U.S. Mint bullion coin | 22 |