Nakornnayok is a province situated in the central region, believed to have been an ancient city in the Tarawadee Era. There is an evidence proving the existence of walls made of soil and canal banks found in the Donglakorn Sub-district. However, the name Nakornnayok, on the east side, is proven to be the forefront of battles in the Ayuthaya Dynasty. During the U-thong Dynasty, in the year 1894 (B.E.2437), former King Rama V decreed the sub-division of the ruling administrative regions. Nakornnayok then belonged to the Prachinburi administrative region until 1902 (B.E. 2445). Later on, King Rama V mandated to abolish the ruling administrative region system and shifted into provincial administration. Nakornnayok was then only a fraction of the Saraburi-Prachinburi province. Afterwards, Nakornnayok had been recognised as an independent province.
During the Krung-Sri Ayuthaya era, Baan Na, the former name of Nakornnayok, had plentiful of plains and forest with a vast area of paddy fields. However, resident farmers were frustrated not reaping anything despite their toil in agricultural endeavours. People then began evacuating also for the reason of avoiding the common flu-like sickness in the area. Later on, the King knew about the situation so he passed an order to abolish taxes on plantation in order to bring back the townsfolk who had fled. From then on, people began returning to their former homes creating an even larger community.
The townspeople had always been used to calling "Muang Na-Yok" which when translated into English means "State of paddy fields, free from plantation taxes". Until now, Thai people still call the province "Nakorn Na Yok - a state of paddy fields, free from plantation taxes".
During the Krung-Sri Ayuthaya era, Baan Na, the former name of Nakornnayok, had plentiful of plains and forest 
with a vast area of paddy fields. However, resident farmers were frustrated not reaping anything despite their toil in agricultural endeavours. People then began evacuating also for the reason of avoiding the common flu-like sickness in the area. Later on, the King knew about the situation so he passed an order to abolish taxes on plantation in order to bring back the townsfolk who had fled. From then on, people began returning to their former homes creating an even larger community. 
The townspeople had always been used to calling "Muang Na-Yok" which when translated into English means 
"State of paddy fields, free from plantation taxes". Until now, Thai people still call the province "Nakorn Na Yok - a state of paddy fields, free from plantation taxes".
