Nong Sida (Thai: หนองสีดา) is a tambon (subdistrict) of Nong Saeng District, in Saraburi Province, Thailand.

In 2019 it had a total population of 963 people.

[1] The tambon is subdivided into 6 administrative villages (muban).

The whole area of the subdistrict is covered by the subdistrict administrative organization (SAO) Nong Hua Pho (องค์การบริหารส่วนตำบลหนองหัวโพ).

This Saraburi Province location article is a stub.