Amphoe Ongkharak ( Thai อำเภอ องครักษ์ ) is a district ( Amphoe - administrative district ) in the western part of Nakhon Nayok. The Nakhon Nayok province is located in the north- eastern part of the central region of Thailand.
Ongkharak means Royal Guard. Once visited King Chulalongkorn ( Rama V ) Mueang Nakhon Nayok the. When he arrived in present-day Amphoe Ongkharak, ill one of his Royal Guards and died shortly thereafter. The king ordered that a shrine in his honor would be built to remember this incident.
Neighboring districts ( from northeast clockwise): the Amphoe Ban Na and Mueang Nakhon Nayok of Nakhon Nayok, Amphoe Ban Sang the province of Prachinburi, Amphoe Bang Nam Priao the province of Chachoengsao, and Amphoe Lam Luk Ka, Thanyaburi and Nong Suea the province Pathum Thani.
The main water resources of the district are the Nakhon Nayok River - and the Khlong Rangsit.
Srinakharinwirot University, Ongkharak campus is located in this district.
The old administration building of the circle Ongkharak was first in Tambon Bang O ( in present-day Amphoe Ban Na). King Chulalongkorn in 1889 commissioned the construction of a canal ( Khlong ) which should connect the Chao Phraya to the Nakhon Nayok River -. The lock on the Chao Phraya River was named Chulalongkorn sluice ( ประตูน้ำ จุฬาลงกรณ์ ), the one at the other end of the channel Saovabha - Bhongsi - lock ( ประตูน้ำ เสาวภา ผ่อง ศรี ), the channel itself was called Khlong Rangsit. Subsequently, the county government was moved to the nearby 16 sub-channel of Khlong Rangsit. About 20 years later, she was again laid in the vicinity of the Saovabha - Bhongsi - lock. Today, the district administration is behind the Saovabha market, 500 meters away from the old location.
The Amphoe Ongkharak is divided into eleven communities ( tambon), which further into 116 villages ( Muban ) are divided.
The small town ( thesaban tambon) Ongkharak ( Thai: เทศบาล ตำบล องครักษ์ ) covers parts of the tambon Ongkharak and Sai Mun.
There are also eleven - Tambon administrative organizations ( " Tambon Administrative Organizations" - TAO, Thai: องค์การ บริหาร ส่วน ตำบล ).