Ewa Beach or simply Ewa is a census-designated place (CDP) located in Ewa District and the City & County of Honolulu along the leeward coast of in . As of the 2010 Census, the CDP had a total population of 14,955.
The word ewa means "crooked" or "ill-fitting" in Hawaiian. The name comes from the myth that the gods Kāne and Kanaloa threw a stone to determine the boundaries, but it was lost and later found at Pili o Kahe.
Along much of the South Shore of , Ewa is a reference to the direction of Ewa Beach, roughly westwards along the shore. Related terms are mauka (towards the mountains, roughly northwards), makai (towards the ocean, roughly South), and Diamond Head or Koko Head, roughly eastwards along the shore.
The U.S. postal code for Ewa Beach is 96706 .