| 31½ gallons: Abbr. | 21 |
| 315 degrees on a compass | 24 |
| 311: "Many ___ since first I saw you" | 47 |
| 311 song about making your own beer? | 36 |
| 311 "You're cruisin', don't ___ care about what you're losing" | 88 |
| 311 "Many ___ since first I saw you" | 46 |
| 311 "Don't Tread ___" | 35 |
| 3101, long ago | 14 |
| 310, to a letter writer | 23 |
| 31-syllable Japanese poem | 25 |
| 31-day mo. | 10 |
| 31,800,000 sq. mi. of water | 27 |
| 31 gal. | 7 |
| 30th wedding anniversary gift | 29 |
| 30th V.P. | 9 |
| 30th Prince Edward Island Premier | 33 |
| 30th president, informally | 26 |
| 30th pres. | 10 |
| 30th or 31st, briefly | 21 |
| 30th anniversary gifts | 22 |
| 30th anniversary gift or Ontario rapids | 39 |
| 30th anniversary gift | 21 |
| 30th anniversary | 16 |
| 30th album might be signs of this | 33 |
| 30°, for 0.5 | 15 |
| 307 for Wyoming and 907 for Alaska | 34 |
| 301, to Diocletian | 18 |
| 301, to Cato | 12 |
| 301, to Caesar | 14 |
| 301, Roman-style | 16 |
| 301, in ancient Rome | 20 |
| 301 | 3 |
| 300-year-old Mexican song that became a Top 40 hit | 50 |
| 300-pound president | 19 |
| 300-lb. president | 17 |
| 300-game winner Glavine | 23 |
| 300-cubit-long vessel | 21 |
| 300-cubit-long craft | 20 |
| 300-cubit-long boat | 19 |
| 300-3,000 MHz range | 19 |
| 300, to Tiberius | 16 |
| 300, to Livy | 12 |
| 300, to Caesar | 14 |
| 300, in Roman numerals | 22 |
| 300, at the Forum | 17 |
| 300 to 3000 megahertz, on the TV | 32 |
| 300 to 3,000 MHz range | 22 |
| 300 to 3,000 MHz | 16 |
| 300 to 3,000 kilohertz | 22 |
| 300 minutes past midnight | 25 |
| 300 in old Rome | 15 |
| 300 cubit-long vessel | 21 |
| 300 to Tiberius | 16 |
| 30.48 centimeters | 17 |
| 30-___ (tennis score) | 21 |
| 30-year-old NBC show | 20 |
| 30-year late-night host | 23 |
| 30-ton military brain | 21 |
| 30-ton computer | 15 |
| 30-stock stat. | 14 |
| 30-something on the BMI scale | 29 |
| 30-second spots, e.g. | 21 |
| 30-second spots | 15 |
| 30-second spot, e.g. | 20 |
| 30-miles-per-hour runners | 25 |
| 30-mile-per-hour runners | 24 |
| 30-footer | 9 |
| 30-day winter month | 19 |
| 30-day trial versions, e.g. | 27 |
| 30-day spring mo. | 17 |
| 30-day span: Abbr. | 18 |
| 30-day period | 13 |
| 30-day month | 12 |
| 30-day mo. | 10 |
| 30-40, say, in a tennis game | 28 |
| 30-300 MHz | 10 |
| 30-30 | 5 |
| 30-0, e.g. | 10 |
| 30- or 60-second spot | 21 |
| 30,000-employee insurance company | 33 |
| 30, in the newsroom | 19 |
| 30, for 1/5 and 1/6, e.g.: Abbr. | 32 |
| 30's-50's Arab ruler | 28 |
| 30's-40's pianist Templeton | 35 |
| 30's-40's bandleader Kay | 32 |
| 30's singer MacDonald | 25 |
| 30's movie dog | 18 |
| 30's migrant | 16 |
| 30's leading lady Farrell | 29 |
| 30's Interior Secretary | 27 |
| 30's home run king | 22 |
| 30's crooner Columbo | 24 |
| 30's chess champ Max | 24 |
| 30's boxing champ Max | 25 |
| 30's and 40's actress Anna | 34 |
| 30's agcy. | 14 |
| 30's actress Grey and others | 32 |
| 30% of venti | 12 |
| 30% of the world's land | 27 |
| 30% of the world | 16 |