Decker, Wisconsin Unincorporated community Decker, Wisconsin Show map of Wisconsin Decker, Wisconsin Show map of the US Coordinates: 43°28′14″N 87°51′45″W﻿ / ﻿43.47056°N 87.86250°W﻿ / 43.47056; -87.86250Coordinates: 43°28′14″N 87°51′45″W﻿ / ﻿43.47056°N 87.86250°W﻿ / 43.47056; -87.86250 Country United States State Wisconsin County Ozaukee Elevation 738 ft (225 m) Time zone Central (CST) (UTC-6) • Summer (DST) CDT (UTC-5) Area code(s) 262 GNIS feature ID 1577567[1]