Oxia (Ancient Greek: ὀξεῖᾰ, Modern Greek: οξεία) may refer to:
the acute accent in polytonic Greek
Oxeia, a Greek island
a 1988 concept car by Peugeot
Oxia Palus quadrangle, one of the 30 quadrangles of the plant Mars
Oxia Planum, a plain on the planet Mars
