Nadia is a female name. Variations include Nadja, Nadya, Nadine, Nadiya, and Nadiia. Most variations of the name are derived from Arabic, Slavic languages, or both.

In Slavic, names similar to Nadia mean "hope" in many Slavic languages: Ukrainian Nadiya (Надія, accent on the i), Belarusian Nadzieja (Надзея, accent on the e), and Old Polish Nadzieja, all of which are derived from Proto-Slavic *naděja, the first three from Old East Slavic. In Bulgarian and Russian, on the other hand, Nadia or Nadya (Надя, accent on first syllable) is the diminutive form of the full name Nadyezhda (Надежда), meaning "hope" and derived from Old Church Slavonic, which it entered as a translation of the Greek word ἐλπίς (Elpis), with the same meaning.

In Arabic, the name is Nadiyyah, meaning "tender" and "delicate." In the Dan language, the word Nãdienã simply means "girl".

Notable people with the name Nadia include: