| Most cool | 9 |
| Most Cook Islanders | 19 |
| Most convinced | 14 |
| Most converse? | 14 |
| Most convenient section of a parking garage, usually | 52 |
| Most convenient | 15 |
| Most contrived | 14 |
| Most contrite | 13 |
| Most contemptuous | 17 |
| Most contemptible | 17 |
| Most conspicuous northern constellation | 39 |
| Most conspicuous | 16 |
| Most considerate | 16 |
| Most conservative, investment-wise | 34 |
| Most conservative | 17 |
| Most congenial | 14 |
| Most confident | 14 |
| Most concise | 12 |
| Most conceited | 14 |
| Most computer buyers | 20 |
| Most comprehensive | 18 |
| Most composed | 13 |
| Most compos mentis | 18 |
| Most complete | 13 |
| Most competent | 14 |
| Most compassionate | 18 |
| Most compact | 12 |
| Most commonly-written word | 26 |
| Most common, to statisticians | 29 |
| Most common, statistically | 26 |
| Most common word in English | 27 |
| Most common U.S. surname | 24 |
| Most common two-dice roll | 25 |
| Most common throw with two dice | 31 |
| Most common throw in dice | 25 |
| Most common sedimentary rock | 28 |
| Most common papal name | 22 |
| Most common of the noble gases | 30 |
| Most common noble gas | 21 |
| Most common mo. for U.S. presidents' birthdays | 50 |
| Most common metal | 17 |
| Most common leading digit according to Benford's law | 56 |
| Most common joiner | 18 |
| Most common inert gas in the atmosphere | 39 |
| Most common inert gas | 21 |
| Most common gulf in crossword puzzles | 37 |
| Most common food additive, to a chemist | 39 |
| Most common first name of U.S. presidents | 41 |
| Most common first name among U.S. presidents (six) | 50 |
| Most common English word | 24 |
| Most common English language word | 33 |
| Most common elements | 20 |
| Most common element on Earth, by mass | 37 |
| Most common draw in Scrabble | 28 |
| Most common dice throw | 22 |
| Most common dice rolls | 22 |
| Most common dice roll | 21 |
| Most common craps roll | 22 |
| Most common chemical compound | 29 |
| Most common blood designation | 29 |
| Most common American surname | 28 |
| Most common | 11 |
| Most comfy | 10 |
| Most comfortable | 16 |
| Most comely | 11 |
| Most colored by the sun | 23 |
| Most college freshman | 21 |
| Most college applicants | 23 |
| Most collectible | 16 |
| Most collected | 14 |
| Most coll. applicants | 21 |
| Most cold, as a gaze | 20 |
| Most cold and damp | 18 |
| Most cogent | 11 |
| Most cobbled-together | 21 |
| Most coarse | 11 |
| Most clueless | 13 |
| Most cloying | 12 |
| Most clowns | 11 |
| Most closely related | 20 |
| Most closefisted | 16 |
| Most close | 10 |
| Most clipped | 12 |
| Most clichéd | 15 |
| Most clever | 11 |
| Most clement | 12 |
| Most clearheaded | 16 |
| Most claudicant | 15 |
| Most churlish | 13 |
| Most chubby | 11 |
| Most chipper | 12 |
| Most chilly, as weather | 23 |
| Most chilly | 11 |
| Most chilling? | 14 |
| Most chilling | 13 |
| Most childishly pure | 20 |
| Most chichi | 11 |
| Most chic | 9 |
| Most cherished | 14 |
| Most cheerleaders | 17 |