Nagako is an uncommon Japanese given name for females. Although written romanized the same way, the kanji can be different. Notable people with the name include:
- , later Empress Nagako of Japan (皇后良子)
- , Japanese servant of two Japanese tennōs during the Heian period
- , Japanese composer
- , Empress of Japan as the consort of Emperor Go-Horikawa
- , Japanese snowboarder, specializing in halfpipe riding
- , Japanese aristocratic
- , Japanese medium, spiritual healer and religious leader
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