The legislative districts of Negros Oriental are the representations of the province of Negros Oriental in the various national legislatures of the Philippines. The province is currently represented in the lower house of the Congress of the Philippines through its first, second, and third congressional districts.

Negros Oriental was divided into two congressional districts from 1907 to 1972, it was redistricted into three congressional districts in 1986. It was part of the representation of Region VII from 1978 to 1984, and from 1984 to 1986 it elected 3 assemblymen at-large. Siquijor was last represented as part of the province's second district in 1972.^[1]

• Cities: Canlaon, Guihulngan (became city 2007)
• Municipalities: Ayungon, Bindoy, Jimalalud, La Libertad, Manjuyod, Tayasan, Vallehermoso
• Population (2020): 445,970^[2]

• City: Bais, Dumaguete, Tanjay (became city 2001)
• Municipalities: Amlan, Mabinay, Pamplona, San Jose, Sibulan
• Population (2020): 535,632^[2]

• City: Bayawan (became city 2000)
• Municipalities: Bacong, Basay, Dauin, Santa Catalina, Siaton, Valencia, Zamboanguita
• Population (2020): 451,388^[2]

• Legislative district of Siquijor