Demographics
Negros Oriental's total population as of the 2010 census is 1,286,666. 34.5% of the population is concentrated in the six most populous component LGUs of Dumaguete City, Bayawan City, Tanjay City, Bais City, Canlaon City, and Guihulngan. The province's average population density is 208 persons per km², lower than the national average of 276 persons per km². Population growth per year is about 2.11%, higher than the national average of 1.92%.
Cebuano (sometimes known as Visayan) is the main language of the province, spoken by 95% of the population. Hiligaynon is spoken by the remaining 5%, and is common in areas close to the border with Negros Occidental. Filipino and English are generally understood, and are used for official, literary, and educational purposes.
Christianity is the predominant religion in the province with Roman Catholicism as the biggest single denomination. Other denominations include mainline and evangelical Protestant groups, the Iglesia Ni Cristo, the Seventh-day Adventists, Jehovah's Witnesses and the Aglipayan Church, also known as the Philippine Independent Church. Adherents of Islam and Buddhism constitute a minority of the population.
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