| Oregon's ___ Bay | 20 |
| Oregon's ___ Lake | 21 |
| Oregon's _____ Lake | 23 |
| Oregon, for one | 15 |
| Oregon, once: Abbr. | 19 |
| Oregon, since 1992 | 18 |
| Oregon, to Yves | 15 |
| Oregon-based shoe company | 25 |
| Oregon-based tea brand | 22 |
| Oregon-to-New York direction | 28 |
| Oregon’s “Emerald City” | 35 |
| Oregonian | 9 |
| Oregonian biologist | 19 |
| Orejón, e.g. | 15 |
| Orel Hershiser e.g. | 20 |
| Orel money | 10 |
| Orel refusals | 13 |
| Orel's river | 16 |
| Orel's stream | 17 |
| Orem is here | 12 |
| Orem locale | 11 |
| Orem native | 11 |
| Orem site | 9 |
| Orem's home | 15 |
| Orem's place | 16 |
| Orem's state | 16 |
| Orenburg is on it | 17 |
| Orenburg's river | 20 |
| Oreo alternative | 16 |
| Oreo and milk action | 20 |
| Oreo center | 11 |
| Oreo filler | 11 |
| Oreo filling | 12 |
| Oreo fillings | 13 |
| Oreo flavor | 11 |
| Oreo innards | 12 |
| Oreo maker | 10 |
| Oreo morpheme | 13 |
| Oreo's center | 17 |
| Oreo's filling | 18 |
| Oreo, for one | 13 |
| Ores | 4 |
| Orestes' tormentors | 23 |
| Orestes's sister and others | 31 |
| Orestes, to Agamemnon | 21 |
| Orfant Annie's creator | 26 |
| Orfe | 4 |
| Orfeo's orecchio | 20 |
| Orfeo, e.g., in Gluck's "Orfeo ed Euridice" | 57 |
| Orff's "___ Burana" | 33 |
| Org alternative | 15 |
| Org. | 4 |
| Org. "formed" inside the four longest answers | 55 |
| Org. "protecting America's consumers" | 51 |
| Org. A.E.S. belonged to | 23 |
| Org. a.k.a. The Company | 23 |
| Org. abolished in 1977 | 22 |
| Org. above it all? | 18 |
| Org. adding the Seattle Sounders FC in 2009 | 43 |
| Org. addressing class conflict | 30 |
| Org. affected by Title IX | 25 |
| Org. affiliated with the College World Series | 45 |
| Org. against DWI | 16 |
| Org. against eating meat and wearing fur | 40 |
| Org. against gun control | 24 |
| Org. against piracy | 19 |
| Org. against the Patriot Act | 28 |
| Org. against workplace discrimination | 37 |
| Org. aiding stranded motorists | 30 |
| Org. Ally McBeal would belong to, were she real | 47 |
| Org. always headed by a U.S. general or admiral | 47 |
| Org. asking "Where's the beef?" | 45 |
| Org. associated with FICA | 25 |
| Org. associated with U.S. Cyber Command | 39 |
| Org. at 11 Wall St. | 19 |
| Org. at Constitution Hall | 25 |
| Org. at the center of the 2007 memoir "At the Center of the Storm" | 76 |
| Org. at the Citadel | 19 |
| Org. attacked in "Bowling for Columbine" | 50 |
| Org. auditing 1040s | 19 |
| Org. awarding cultural grants | 29 |
| Org. backing Obamacare | 22 |
| Org. banned from 1960 to 1990 | 29 |
| Org. based in Belgium | 21 |
| Org. based in Daytona Beach | 27 |
| Org. based in Fort Meade, Maryland | 34 |
| Org. based in Indianapolis | 26 |
| Org. based in Langley | 21 |
| Org. based in Langley, VA | 25 |
| Org. based in Langley, Va. | 26 |
| Org. based in Langley, Virg. | 28 |
| Org. based in Langley, Virginia | 31 |
| Org. based in McLean, Va. | 25 |
| Org. based in Nashville | 23 |
| Org. based in Palm Beach Gardens | 32 |
| Org. based in Palm Beach Gardens, Florida | 41 |
| Org. based in Strasbourg | 24 |
| Org. based in Vienna | 20 |
| Org. based in Washington, D.C. | 30 |
| Org. battled by 007 | 19 |