Sawaeng Ha (Thai: แสวงหา, pronounced [sā.wɛ̌ːŋ hǎː]) is the northernmost district (amphoe) of Ang Thong province, central Thailand.

The name of Tambon Sawaeng Ha was first found in the Ayutthaya Kingdom records.

The government thus set up a commando division in Tambon Sawaeng Ha to sweep them up.

[2] Neighbouring districts are (from the north clockwise) Khai Bang Rachan and Tha Chang of Sing Buri province, Pho Thong of Ang Thong province, and Si Prachan, Sam Chuk and Doem Bang Nang Buat of Suphan Buri province.

The district is divided into seven sub-districts (tambons), which are further subdivided into 61 villages (mubans).