红河三角洲（越南语：Đồng bằng Sông Hồng／.mw-parser-output .han-nom{font-family:"Nom Na Tong","Han-Nom Gothic","Han-Nom Ming","HAN NOM A","HAN NOM B","Ming-Lt-HKSCS-UNI-H","Ming-Lt-HKSCS-ExtB","FZKaiT-Extended","FZKaiT-Extended(SIP)","FZKaiS-Extended","FZKaiS-Extended(SIP)","Sun-ExtA","Sun-ExtB","MingLiU","MingLiU-ExtB","MingLiU_HKSCS","MingLiU_HKSCS-ExtB","SimSun","SimSun-ExtB",sans-serif} 垌平瀧紅?（红河平原），也称 Đồng bằng Bắc Bộ／垌平北部（北部平原））是越南北部由红河及其支流太平江冲积而成的平原，面积约为15,000平方公里。由河渠的堤坝所保护。这是一片开发历史悠久的农业区，人口极为密集，大部分土地早已经开垦为水稻田。

红河三角洲地区包括越南的9个省和2个直辖市。这里也是京族最早演化出来的地方。