Valencia, officially the Municipality of Valencia, is a 1st class municipality in the province of Negros Oriental, Philippines. According to the 202…Valencia, officially the Municipality of Valencia, is a 1st class municipality in the province of Negros Oriental, Philippines. According to the 2020 census, it has a population of 38,733 people. It is located 10 kilometres west of Dumaguete, the most populated city and capital of the province. The municipality was voted as "the greenest and cleanest" town of Negros Oriental in 2007.