Kalmar "Costanoan" yawanci tana nufin ƙungiyar ƴan asalin ƙasar Amirka waɗanda a tarihi suka rayu a yankunan bakin teku da na cikin California, musamman a tsakiya da arewacin jihar. Sunan "Costanoan" ya samo asali ne daga kalmar Mutanen Espanya "costa" ma'ana "coast."Duk da haka, yana da mahimmanci a lura cewa amfani da kalmar "Costanoan" don kwatanta waɗannan 'yan asalin Amirkawa yana da rikici. kuma ba a yarda da duniya ba. Wasu sun gwammace su yi amfani da madadin sunaye, kamar Ohlone ko Muwekma, don komawa ga takamaiman ƙungiyoyin da ke cikin wannan yanki mai faɗin al'adu da harshe.