Thap Yai Chiang () is a subdistrict in the Phrom Phiram District of Phitsanulok Province, Thailand.
Geography Thap Yai Chiang lies in the Nan Basin, which is part of the Chao Phraya Watershed.
Administration The following is a list of the subdistrict's muban, which roughly correspond to villages:Pitlocal.org(in Thai) No. English Thai 1 Ban Sai Ngam บ้านไทรงาม 2 Ban Si Charoen บ้านศรีเจริญ 3 Ban Rai บ้านไร่ 4 Ban Nong Makhang บ้านหนองมะคัง 5 Ban Thap Yai Chiang บ้านทับยายเชียง 6 Ban Ka Nam Sut บ้านเขาน้ำสุด
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