Lat Yao district
|• Total||691.1 km2 (266.8 sq mi)|
|• Density||130/km2 (340/sq mi)|
|Time zone||UTC+7 (ICT)|
Originally, Lat Yao was part of Krok Phra district. Khun Lat Boriban (ขุนลาดบริบาล), the head of the tambon, developed the infrastructure of the tambon. In 1913, he proposed to the governor of Nakhon Sawan that the tambon should be upgraded to a district. The project was approved and the new district created.
Neighboring districts are (from the north clockwise): Khanu Woralaksaburi of Kamphaeng Phet province, Banphot Phisai, Mueang Nakhon Sawan and Krok Phra of Nakhon Sawan Province, Sawang Arom of Uthai Thani province, and Chum Ta Bong and Mae Wong of Nakhon Sawan.
The Sakrae Krang River flows through the district. The Department of Royal Irrigation (RID) has declared its intention to build a dam on the river in the district. The dam has attracted significant local opposition. Opponents have rejected four health and environment impact assessments (EHIA), pointing out that they fail to address mitigation and the impact on the forest ecology.
The district is divided into 12 sub-districts (tambons), which are further subdivided into 149 villages (mubans). Lat Yao and Sanchao Kai To are two townships (thesaban tambon), each covering parts of the same-named tambon. There are a further 12 tambon administrative organizations (TAO).
|2.||Huai Nam Hom||ห้วยน้ำหอม||9||6,773|
|8.||Nong Nom Wua||หนองนมวัว||9||5,149|
|16.||Sanchao Kai To||ศาลเจ้าไก่ต่อ||12||13,491|
The missing numbers 11-15 were split off as Mae Wong district
- Wat Khao Samuk 
- Wipatayotin, Apinya (4 September 2017). "Better options urged for Mae Wong dam". Bangkok Post. Retrieved 4 September 2017.
- Zoom (2015-07-17). "บ้านหนองนมวัว...วันนี้ ไม่มี "อีแย้ม" มีแต่ "เจ๊วีณา"" [Ban Nong Nok Wua...today, there is no "I Yam" but only "Jay Veena"]. Thai Rath (in Thai).