Nagaoka may refer to:
- 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
- Go Nagaoka (長岡 郷, born 1984), Japanese footballer
- Hantaro Nagaoka (長岡 半太郎, 1865–1950), Japanese physicist responsible for the 1904 "Saturnian" model of atomic structure
- Miyu Nagaoka (長岡 望悠, born 1991), Japanese volleyball player
- Yayoi Nagaoka (長岡 弥生, born 1974), Japanese speed skater
- Yūya Nagaoka (長岡 裕也, born 1985), Japanese shogi player
- Nagaoka (crater), a lunar crater named after Hantaro Nagaoka
|This disambiguation page lists articles associated with the title Nagaoka.
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