- 大年三十 dàniánsānshí New Year's EveThe last day of the lunar year, specifically Chinese New Year's Eve.
- 三十六 sānshíliù thirty-sixthe number 36.
- 二三十 èrsānshí twenty or thirtyreferring to a round, approximate number between twenty and thirty
- 三十六计 sānshíliùjì all schemesall possible stratagems or various tricks used to achieve a goal or solve a problem
- 三十而立 sānshí'érlì established at thirtyreaching maturity and independence at age thirty (idiom, from Confucius)
- 三十五 sānshíwǔ thirty-fivethe cardinal number 35
- 三十一 sānshíyī thirty-onethe cardinal number 31
- 三十七 sānshíqī thirty-seventhe cardinal number 37.
- 年三十 niánsānshí New Year's EveThe last day of the lunar year, also known as Chinese New Year's Eve.
- 三十二位元 sānshí'èrwèiyuán 32-bit32-bit (computing)
- 三十二相 sānshí'èrxiàng thirty-two marksthe thirty-two physical characteristics of Buddha
- 三十八度线 sānshíbādùxiàn 38th parallelThe dividing line at 38 degrees north latitude in Korea, agreed at Yalta between US and Soviet zones of influence and now the location of the DMZ.
- 三十六字母 sānshíliùzìmǔ thirty-six initialsthe thirty-six initial consonants of Song dynasty phonetic theory
- 三十六计，走为上策 sānshíliùjì, zǒuwéishàngcè retreatingThe best option among the thirty-six stratagems is to flee; indicates that leaving or retreating is the most prudent course of action when faced with a difficult or unwinnable situation.
- 三十多 sānshíduō more than thirtya quantity slightly greater than thirty, used as a numeral to indicate an approximate number.
- 三十年河东，三十年河西 sānshíniánhédōng, sānshíniánhéxī vicissitudesthe idea that life's fortunes are constantly changing and unpredictable over time; change is the only constant
