Song Phi Nong (Thai: สองพี่น้อง, pronounced [sɔ̌ːŋ pʰîː nɔ́ːŋ]) is the southernmost district (amphoe) of Suphan Buri province, central Thailand.

There is also another explanation that is a folk tale about two brothers or two elephants that are siblings.

[2] Neighbouring districts are (from the north clockwise): U Thong and Bang Pla Ma of Suphan Buri Province; Lat Bua Luang of Ayutthaya province; Bang Len and Kamphaeng Saen of Nakhon Pathom province; and Tha Maka and Phanom Thuan of Kanchanaburi province.

Song Phi Nong is divided into 15 subdistricts (tambons), which are further subdivided into 140 administrative villages (mubans).

There is one town (thesaban mueang) in the district: There is one subdistrict municipality (thesaban tambon) in the district: There are 14 subdistrict administrative organizations (SAO) in the district: This Suphan Buri Province location article is a stub.