| Information gleaned from a dating site | 38 |
| Information disparity in a social system | 40 |
| Information collection on a computer | 36 |
| Information available to everyone | 33 |
| Information accessed on a computer | 34 |
| Informal union after the Holy Alliance | 38 |
| Informal term of address, in Britain | 36 |
| Informal response to "Who's there?" | 49 |
| Informal request to an accountant? | 34 |
| Informal reply to "Who's there?" | 46 |
| Informal party with light refreshments | 38 |
| Informal name for the double bass | 33 |
| Informal lead-in to ''girl!'' | 45 |
| Informal international agreement | 32 |
| Informal headwear that can't be shared? | 43 |
| Informal greeting at a breakfast shop | 37 |
| Informal fallacy used in an argument | 36 |
| Informal eateries with Mexican fare | 35 |
| Informal British term of address | 32 |
| Informal awards for poor bombing | 32 |
| Informal advice to an overeager picker? | 39 |
| Informal "See what I mean?" | 37 |
| Informal ''Understood!'' | 40 |
| Infomercial "before" photo | 36 |
| Infomercial "after" photo | 35 |
| Info that might make a bettor better | 36 |
| Info that might be added to an add. | 35 |
| Info that may be stored with passwords | 38 |
| Info taken in a Dr.'s office | 32 |
| Info supplier for a natl. security briefing | 43 |
| Info source, with "the" | 33 |
| Info put on some schedules: Abbr. | 33 |
| Info on the reverse of a title page: Abbr. | 42 |
| Info jotted down about baby beds? | 33 |
| Info in a library search request | 32 |
| Info from the cockpit, for short | 32 |
| Info for an airport greeter, for short | 38 |
| Info for an airport car service, briefly | 40 |
| Influential WWII journalism couple | 34 |
| Influential second-century astronomer | 37 |
| Influential pre-Renaissance Florentine artist | 45 |
| Influential play for the genre of sci-fi | 40 |
| Influential journal publisher: Abbr. | 36 |
| Influential industrial band, on concert shirts | 46 |
| Influential Harper's Weekly cartoonist | 42 |
| Influential group of men from Athens | 36 |
| Influential French landscapist of the 1800s | 43 |
| Influential French artist: 1881–1955 | 43 |
| Influential Darwin work in Salem?, | 34 |
| Influential 1957 jazz album "___ Ahead" | 49 |
| Influential 17th/18th-century theologian | 40 |
| Influential '80s hardcore label | 35 |
| Influence that's derived from injury? | 41 |
| Influence (with ''on'') | 39 |
| Inflation-fighting org. during WWII | 35 |
| Inflated currency of the 20's | 33 |
| Inflatable pilot in "Airplane!" | 41 |
| Inflammatory elevation of the skin | 34 |
| Inflammatory condition of the skin | 34 |
| Inflammation of the respiratory tract | 37 |
| Infiniti's infinity symbol, e.g. | 36 |
| Infinitesimal time period: Abbr. | 32 |
| Infinitesimal fraction of a min. | 32 |
| Infinitesimal division of a min. | 32 |
| Infinitely repeated geometric pattern | 37 |
| Infielders' stats, for short | 32 |
| Infielders and outfielders make them | 36 |
| Infielder's warm-up exercise | 32 |
| Infielder who plays in the House That Ruth Built | 48 |
| Infield surrounder at a horse track | 35 |
| Infestation with them is called pediculosis | 43 |
| Inferred cosmic substance (Russian) | 35 |
| Inferior, as a product, slangily | 32 |
| Inferior tour vehicle for Snoop Dogg? | 37 |
| Inferior salad dressing ingredient? | 35 |
| Infectious disease that causes a rash | 37 |
| Infections of some sebaceous glands | 35 |
| Infection fighter that comes from a neck gland | 46 |
| Infatuated with (with "over") | 39 |
| Infants "in the woods" | 32 |
| Infantry officer's half-pike | 32 |
| Infant's place on an auto trip | 34 |
| Infant's dresses, Victorian style | 37 |
| Infant on the first "TV Guide" cover | 46 |
| Infant in his or her first month | 32 |
| Infant cupid in Italian paintings | 33 |
| Infamous Valentine's Day event | 34 |
| Infamous settler on Galveston Island, 1817 | 42 |
| Infamous nuclear site, for short | 32 |
| Infamous first name among hoteliers | 35 |
| Infamous fiddler of ancient times | 33 |
| Infamous family of the late 1800s | 33 |
| Infamous family cited by Machiavelli | 36 |
| Infamous booze boss in the 20's | 35 |
| Infamous ball toucher of the '00s | 37 |
| Infamous "Jeopardy!" champion Arthur | 46 |
| Inexperienced shucker, at times? | 32 |
| Inexperienced newspaper employees | 33 |
| Inexpensive Sherlock Holmes job? | 32 |
| Inexpensive extermination device | 32 |