Wat Sommanat (Thai: วัดโสมนัส, pronounced [wát sǒːm.mā.nát]) is a khwaeng (sub-district) in Pom Prap Sattru Phai District, Bangkok.

Wat Sommanat is named after Wat Sommanat Wihan, a local Buddhist temple that faces Khlong Phadung Krung Kasem canal.

The sub-district bordered by other areas (from the north clockwise): Dusit and Suan Chitlada in Dusit District (Khlong Phadung Krung Kasem is a borderline), Si Yaek Maha Nak in Dusit District (Khlong Phadung Krung Kasem is a borderline), Khlong Maha Nak and Ban Bat in its district (Lan Luang Road is a borderline), and Ban Phan Thom with Bang khun Phrom in Phra Nakhon District (Outer Ratchadamnoen Avenue is a borderline).

[2] Nang Loeng is another name for the area.

In 2019, it had a total population of 6,672 people.