Zhāng Dìng 章定 (fl. 1209), native of Jiànān 建安 (modern Fújiàn), Southern-Sòng surname-prosopographer. His career is otherwise unrecorded. The single work attributed to him is the Míngxián shìzú yánxíng lèigǎo 名賢氏族言行類稿 (KR3k0026) in 60 juan, dated by his own statement to Jiādìng 2 (1209). His grandfather Zhāng Cáishào 章才劭 in youth studied with Yáng Shí 楊時 (Yáng Guīshān) — one of the great Northern-Sòng disciples of the Chéng brothers — and held the prefectures of Línhè and Chényáng; his great-grandfather Zhāng Yuánzhèn 章元振 was a Jiàn-yán-period jìnshì and Tījǔ Guǎngdōng chángpíng. The family thus stood in the ChéngZhū intellectual lineage.