Sūn Yǔnzhōng 孫允中 (CBDB id 68533; fl. ca. 1517–1544) was a Míng official whose biographical details are largely unknown. The CBDB records only a floruit year of 1517, but his KR4k0082 Yúnzhōng Jìbiàn 雲中紀變 describes events from the Jiājìng Jiǎshēn year (1544), indicating he was active into the mid-Jiājìng period. He wrote the Yúnzhōng Jìbiàn, a prose account of the 1544 military mutiny at Dàtóng 大同, which offers a detailed insider perspective on the political and military crisis of the Jiājìng northern frontier and amounts to an apologia for the Censor-in-chief Cài Tiānyòu 蔡天祐. Native place, examination record, and other offices are unknown.