Amphoe Mueang Sa Kaeo (Thai: เมืองสระแก้ว) is the capital district (amphoe mueang) of Sa Kaeo province, eastern Thailand.

Neighboring districts are (from the north clockwise) Khon Buri of Nakhon Ratchasima province, Watthana Nakhon and Khao Chakan of Sa Kaeo, and Kabin Buri and Na Di of Prachinburi province.

The Sankamphaeng Range mountainous area is in the northern section of this district, within its forested hills at the boundary between Sa Kaeo and Prachinburi Province is the Pang Sida National Park.

[2] The district is divided into eight sub-districts (tambons), which are further subdivided into 124 villages (mubans).

Missing numbers are tambon now forming Khao Chakan District.