Wat Ta Yom (Thai: วัดตายม) is a subdistrict (tambon) in the Bang Krathum District of Phitsanulok Province, Thailand.

Wat Ta Yom is bordered to the north by Nong Phra in Wang Thong District, to the north-east by Phan Chali in Wang Thong District, to the south-east by Noen Kum, and to the south-west by Phai Lom and to the north-west by Nakhon Pa Mak.

The subdistrict lies in the Nan Basin, which is part of the Chao Phraya Watershed.

The economy of Wat Ta Yom is almost entirely based on agriculture, and the chief product is rice.

Wat Ta Yom is administered by a Tambon administrative organization (TAO).