| Illinois politician Henry and family | 36 |
| Illinois or Oriental, briefly, in Monopoly | 42 |
| Illinois home to Caterpillar, Inc. | 34 |
| Illinois home of the John Deere Pavilion | 40 |
| Illinois home of Rotary International | 37 |
| Illinois home of Black Hawk College | 35 |
| Illinois governor before Blagojevich | 36 |
| Illinois city where Roger Ebert was born | 40 |
| Illinois city that symbolizes Middle America | 44 |
| Illinois city symbolizing middle America | 40 |
| Illinois city symbolizing mainstream America | 44 |
| Illinois city on the Mississippi | 32 |
| Illinois city famed for test-marketing | 38 |
| Illinois cheerleader's frequent request | 43 |
| Illinois birthplace of William Jennings Bryan | 45 |
| Illinois birthplace of Newhart and Hemingway | 44 |
| Illinois birthplace of Fred MacMurray | 37 |
| Illinois birth city of Cindy Crawford | 37 |
| Illinois Benedictine College site | 33 |
| Illiciting stares from the punctual | 35 |
| Illicit use of authority using brute force | 42 |
| Illicit Prohibition-era establishment | 37 |
| Illegally try to collect flood insurance? | 41 |
| Illegally reproduce, as software | 32 |
| Illegally absent from the U.S.A. | 32 |
| Illegal use of someone else's Visa card? | 44 |
| Illegal trip across the median strip, perhaps | 45 |
| Illegal thing to put on a baseball | 34 |
| Illegal substance for an athlete: Abbr. | 39 |
| Illegal search and seizure doctrine | 35 |
| Illegal move at a double yellow line | 36 |
| Illegal audio broadcasts, collectively | 38 |
| Ill. city where Lincoln is buried | 33 |
| Ill-starred lady of Celtic legend | 33 |
| Ill-mannered sort of salesperson? | 33 |
| Ill-fated WWI admiral Maximilian von ___ | 40 |
| Ill-fated U.S. submarine of 1968 | 32 |
| Ill-fated salesman in a 1949 drama | 34 |
| Ill-fated Russian sub of 8/12/00 | 32 |
| Ill-fated favorite of Elizabeth I | 33 |
| Ill-fated Civil War assault at Gettysburg | 41 |
| Ill-fated Bush Supreme Court nominee Harriet | 44 |
| Ill-fated attraction built on Isla Nublar | 41 |
| Ill-fated attackers of 1588 and 1589 | 36 |
| Ill-fated "Seinfeld" fiancee | 38 |
| Ill-advised method of dental whitening? | 39 |
| Ill-advised maneuver on a one-way street | 40 |
| Ilka Chase's "___ We Cry" | 39 |
| Il Duce's daughter and son-in-law | 37 |
| Ike's second Sec. of the Interior | 37 |
| Ike's partner in 1960s-'70s music | 41 |
| Ike's onetime singing partner | 33 |
| Ike's one-time singing partner | 34 |
| Ike's hdqrs. in the 40's | 32 |
| Ike's British colleague in arms | 35 |
| Ike & ___ Turner (1960's-70's duo) | 46 |
| IHOP '__: takeout food program | 34 |
| Iguana on "Dora the Explorer" | 39 |
| Igor, to Dr. Frankenstein: Abbr. | 32 |
| Igor player in "Young Frankenstein" | 45 |
| Igor Ivan Sikorsky's 1939 good idea | 39 |
| Ignoring modern sensibilities, for short | 40 |
| Ignoring it might lead to disconnection | 39 |
| Ignored one's scheduled departure date | 42 |
| Ignore the "Do Not Disturb" sign | 42 |
| Ignore a property owner's warning sign | 42 |
| Ignore a property owner's signs, perhaps | 44 |
| Ignorant youngsters are afraid of Casper? | 41 |
| Ignorant or foolish person, in slang | 36 |
| Ignis fatuus, the fair maid of ___ | 34 |
| Igneous rock that solidifies deep in the earth | 46 |
| Igneous rock composed of feldspar and hornblende | 48 |
| Igneous rock beneath the earth's surface | 44 |
| Ignatz Mouse's brick-throwing target | 40 |
| Igloo? (or digging tool missing a piece) | 40 |
| Iggy Pop's backup group, with "The" | 49 |
| Iggy Pop band, before the Stooges | 33 |
| Iggy Pop "Eggs On ___" | 32 |
| Iggy Pop "Eat Or Be ___" | 34 |
| Iger's predecessor at Disney | 32 |
| Iffy thing to wear in a windstorm? | 34 |
| If-then-__: programmer's sequence | 37 |
| If-all-goes-wrong-the-first-time scheme | 39 |
| If's partner, in programming | 32 |
| If ____ Would Leave You : Camelot ballad | 42 |
| If ____ Have You : 1976 hit song | 34 |
| If ___ (should circumstances warrant) | 37 |
| If ___ (Kenneth Cole shoe brand) | 32 |
| If you're tired, you've lost it | 39 |
| If you're on it, you're going to hell | 45 |
| If you're in it, you're out of it | 41 |
| If you're in a hurry, step on this | 38 |
| If you're human, you'll do it | 37 |
| If you're here, you'll take a dive | 42 |
| If you're fair, you might want a high one | 45 |
| If you're fair, it's hard to get one | 44 |
| If you're coherent, you can make it | 39 |
| If you use one, you're a sucker | 35 |
| If you take this, you'll be sick | 36 |
| If you stop wearing one, you may lose a point | 45 |