Nagaoka (jap. 長岡, 永岡 lit. "length, hill", "eternity, hill") may refer to:
Places
- Nagaoka, Niigata, Japan
- Nagaoka-kyō, the capital of Japan from 784 to 794
- Nagaokakyō, Kyoto, Japan, a city at the location of Nagaoka-kyō
- Izunagaoka, Shizuoka, Japan, a former town in Izu Peninsula
People with the surname
- , Japanese bobsledder
- , Japanese footballer
- , Japanese physicist responsible for the 1904 "Saturnian" model of atomic structure
- , Japanese diplomat and jurist
- , Japanese baseball player
- , Japanese politician
- , Japanese ski jumper
- , Japanese women's basketball player
- , Japanese Masters athlete
- , Japanese volleyball player
- , Japanese religious leader
- , Japanese musician and singer
- , Japanese illustrator
- , Japanese speed skater
- , Japanese pair skater
- , Japanese shogi player
- , Japanese politician
- , Japanese judoka
Other uses
- Nagaoka (crater), a lunar crater named after Hantaro Nagaoka