Sandgerðisbær is an Icelandic municipality located in southwestern Iceland on the Southern Peninsula. The land area of Sandgerðisbær is covers the entire western coast of Miðnes (Rosmhvalanes) north from Garðskagi to Ósabotnar in the south. Inland the land area of Sandgerðisbær stretches into the international airport at Keflavíkurflugvöllur with the air terminal within the municipal boundaries.