NHZ can refer to:

• the IATA code for Naval Air Station Brunswick
• the ISO 639-3 code for the Santa María la Alta Nahuatl dialect
• nHz, nanohertz, a frequency of one cycle per 10⁹ seconds (about 32 years)

• Osamu James Nakagawa
• Osamu Kitamura
• Osamu Koyabu
• Osamu Kuraishi
• Osamu Mandai
• Osamu Mihara
• Osamu Miyazaki
• Osamu Nakamura
• Osamu Saito
• Osamu Sato
• Osamu Sato (boxer)
• Osamu Satoh
• Osamu Satou
• Osamu Satō
• Osamu Shimomura (economist)
• Osamu Shimomura (Economist)
• Osamu Suzuki
• Osamu Suzuki (ceramist)
• Osamu Suzuki (disambiguation)
• Osamu Suzuki (industrialist)
• Osamu Suzuki (screenwriter)
• Osamu Tada
• Osamu Tsurumine
• Osan College Station
• O Sanctissima