Sanwa () may refer to:
Places Sanwa, Hiroshima, a former town in Hiroshima Prefecture Miwa, Hiroshima, a former town in Hiroshima Prefecture (different romanization but same Japanese name) Sanwa, Ibaraki, a town in Ibaraki Prefecture Sanwa, Nagasaki, a former town in Nagasaki Prefecture Sanwa, Niigata, a former village in Niigata Prefecture Sanwa, slang for "San Joaquin Valley", California
Companies Sanwa Electric Instrument, A Japanese company manufacturing digital and analog multimeters and electrical measurement instruments Sanwa Electronic, A Japanese company manufacturing radio-controlled model transmitters Sanwa Bank, A Japanese bank now part of The Bank of Tokyo-Mitsubishi UFJ Sanwa Group, A former keiretsu, or business group