Thap Yai Chiang (Thai: ทับยายเชียง) is a subdistrict in the Phrom Phiram District of Phitsanulok Province, Thailand.

Thap Yai Chiang lies in the Nan Basin, which is part of the Chao Phraya Watershed.

The following is a list of the subdistrict's muban, which roughly correspond to villages:[1]

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