Nakhon Nayok, a central Thai province, has a history dating back to the Dvaravati period, with archeological evidence like ancient earthen walls and moats found in Dong Lakhon. First documented as an eastern frontier town during the Ayutthaya Kingdom under King U-Thong, Nakhon Nayok’s role was critical as a strategic outpost. Due to its dense forests, the area was difficult to cultivate, leading to repeated cycles of abandonment until a royal tax exemption was introduced to encourage settlement and growth. The province was officially reorganized multiple times, joining the Prachinburi region under King Rama V’s administrative reforms and briefly merging with Prachinburi and Saraburi from 1943 to 1946 before becoming a separate province.

Today, Nakhon Nayok’s landscape is characterized by vast plains, upland forests, and mountains like Khao Yai and Khao Cha Ngok, which contribute to its reputation for natural beauty, unspoiled waterfalls, and clean air. Covering an area of roughly 2,122 square kilometers, the province is divided into four districts: Mueang Nakhon Nayok, Ban Na, Ongkharak, and Pak Phli, each showcasing the area's historical roots and natural attractions.