- 皇太子 huángtàizǐ crown prince
- 太子港 Tàizǐgǎng Port-au-PrincePort-au-Prince, capital of Haiti
- 太子河区 Tàizǐhéqū Taizihe DistrictTaizihe district of Liaoyang city, Liaoning
- 太子太保 tàizǐtàibǎo crown prince's tutortutor to the crown prince (in imperial China)
- 太子妃 tàizǐfēi crown princessthe official wife of a crown prince in a monarchy.
- 太子洗马 tàizǐxiǎnmǎ crown prince's attendantan official post in ancient China responsible for attending to the Crown Prince, often involving the management of texts and documents; in this title, '洗' is pronounced 'xiǎn'
- 燕太子丹 Yān Tàizǐ Dān Prince DanPrince Dan of Yan (died 226 BC), who commissioned the attempted assassination of King Ying Zheng of Qin (the future First Emperor) by Jing Ke in 227 BC
- 圣德太子 Shèngdé Tàizǐ Prince ShōtokuPrince Shōtoku Taiji (574-621), a major Japanese statesman and reformer of the Asuka period who promoted state Buddhism and is revered as a Buddhist saint.
- 雪山太子 Xuěshān Tàizǐ Meili Snow MountainsMeili Snow Mountains in Diqing Tibetan Autonomous Prefecture, Yunnan
- 太子丹 Tàizǐ Dān Prince DanPrince Dan of Yan (d. 226 BC), who commissioned the attempted assassination of King Ying Zheng of Qin (later the First Emperor Qin Shi Huang) by Jing Ke in 227 BC
- 太子党 tàizǐdǎng princelingsprincelings, descendants of senior communist officials (PRC)
- 太子十三峰 Tàizǐshísānfēng Meili peaksthirteen peaks of Meili Snow Mountains in Diqing Tibetan Autonomous Prefecture, Yunnan
