Chai Nat province in the context of "Suphanburi province"

Suphan Buri (Thai: สุพรรณบุรี, pronounced [sù.pʰān būrīː]), located in the central region of Thailand, is one of the country's 76 provinces (จังหวัด, changwat), its first-level administrative divisions. Suphan Buri's neighbouring provinces are (from north clockwise) Uthai Thani, Chai Nat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Nakhon Pathom and Kanchanaburi. In 2018, the province had a population of around 848,700, making up about 1.28% of the Thailand's total.

Suphan Buri Province has a moderately diverse ethnic population, the majority of which are of Tai, Mon, Lao, Chinese, and Khmer descent.

Sing Buri (Thai: สิงห์บุรี, pronounced [sǐŋ būrīː]) is one of the central provinces (changwat) of Thailand. Neighboring provinces are (from north clockwise) Nakhon Sawan, Lopburi, Ang Thong, Suphan Buri, and Chai Nat.

According to the Ayutthaya Testimonies, the province center, Sing Buri, was founded by the Siamese monarch Anuraja in the early 12th century, who established it as the new capital of the Phraek Si Racha region, thereby superseding Chai Nat as the administrative center of the polity.

Nakhon Sawan province (Thai: จังหวัดนครสวรรค์, pronounced [ná(ʔ).kʰɔ̄ːn sā.wǎn], lit. 'Heavenly City') is one of Thailand's seventy-six provinces (changwat). It lies in lower northern Thailand, neighbouring the provinces of Kamphaeng Phet, Phichit, Phetchabun, Lopburi, Sing Buri, Chai Nat, Uthai Thani, and Tak (clockwise from north).