before 1000 B.E., no characters were used. But Uttaradit is already inhabited as evidenced by Discover ancient color paintings on the cliff of Khao Ta Prohm behind Thong Saen Khan District Office. And the great drum of bronze At Tha Sao Subdistrict, Muang District, Uttaradit, in the year 1927, we know that Uttaradit is a land that people came to have lived before 1000 BC because the artifacts that were discovered are metal. That are used in the Bronze Age or the early metal age that is before that history.

in the Sukhothai period, the area of Uttaradit Province has established several cities such as Fang or MuangSavakkaBuri, a city whose name appears in the stone inscriptions of Sukhothai. When PhraMahathamrachaLithai of Sukhothai built PhraMahathat at Nakhon Chum At the end of the inscription was mentioned Fang, a city of the Sukhothai Kingdom And continues to be a city until the Ayutthaya period, now Fang is in the local area MueangUttaradit District From the discovery of the city and the stupa with the same characteristics as the ancient city of Sukhothai In addition, the kidnapping law of King Rama I of Ayudhya was named Thung Yang in the palace. Currently in the area of Laplae District, another ancient city is the city of Tashu. The Nan River is a natural moat. There is a description of the city in the Sukhothai stone inscription. Currently in the local area of Tron.

Since the reign of King U Thong built Ayutthaya in 1893, there were 16 cities in this number of cities Pichai, which is in the area of Uttaradit. Currently included King Naresuan the Great, when he raised his army to expel Burmese soldiers in the northern districts. Phraya Sawankhalok and Phraya Phichai The city refused to consign the force to help King Naresuan the Great, so the two governors executed and exterminated the citizens of Phitsanulok.

Year 1772, the reign of King Thonburi, PoSupla, Burmese army chief, when marching through the Thai border. Divided an army to hit the city and brought an army to hit the city of Phichai at that time, there were still few army in Phichai. Phraya Phichai saved the city and asked for the city of Phitsanulok to help Chao Phraya Surasi hurriedly conscripted an army up to Phichai to hit the Burmese camp. Phraya Pichai lifted out and hit the other side. The Burma Army was unable to resist, it was broken and fled. Later, 1773, PoSupala, Burma Army commander, attacked Phichai again. But the Thai side knew first Chao Phraya Surasi and Phraya Phichai invited each other to raise an ambush to intercept the Burmese army. When the Burma Army came to Chao Phraya, Surasi and Phraya Phichai started a mobilization. The Thai side has the advantage. The Burmese hit the PoSupla troops, returning to this battle when they entered the battle. Phraya Pichai with a sword both hands chased Burma until the sword was broken. Famously known as "Phraya Pichai, broken sword".

during the reign of King Rama III, Phichai City became an important city. The city has expanded to expand its border to Vientiane, along the Mekong River. Which is a city in front Meanwhile, with Bang Pho Tha It Which is adjacent to the Nan River Which is the only major river that can be conveniently used for trading up to the north Above and above the shallow river with many islands. Therefore, it is a place to collect products from LuangPrabang, Phrae, Nan, and Sipsongpanna region bring local products to go on land for sale. And forwarded downstream to Bangkok in the year 1887. His Majesty King Chulalongkorn saw that At Bang Pho Sub-district, Tha It will continue to flourish in the future. With a good commercial location along the Nan River People migrate to live more and more every year. Therefore please make it a city of Uttaradit, which means the port city of the north and please Uttaradit as a colonel of Phichai. At the city of Uttaradit At that time, Uttaradit has become a larger community than Pichai City, 1915, so please change it. The name of Phichai City has been a city of Uttaradit until now.