Ahaitz or Ahaize is a Basque place name referring to flat areas in mountainous ranges favorable to human settlement. It literally means "rock". It may refer to:

• Ahaize, a hamlet of the commune of Ossès.

• Ahaxe, a commune of the Pyrénées-Atlantiques.

It is at the origin of place names as:

• Ahetze, a commune of the Pyrénées-Atlantiques and a former mande of Lower Navarre.

• Ahaizparren: Hasparren, Azparren, Asparren

• Aezkoa (Ahezcoa in 1137), a valley of Navarre.

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