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:
- Princess Kuni Nagako (久邇宮良子女王), later Empress Nagako of Japan (皇后良子)
- Nagako Konishi (born 1945), a female composer
- Nagako Mori is a snowboarder from Chiba, Japan, specializing in halfpipe riding
- Fujiwara no Nagako was a servant of two Japanese tennōs
- Nabeshima Nagako was a feature of Japanese high society
- Nagako Nagaoka, Japanese religious leader