1 definition found boyne city - U.S. Gazetteer (1990) : Boyne City, MI (city, FIPS 9820) Location: 45.21324 N, 85.01385 W Population (1990): 3478 (1936 housing units) Area: 10.0 sq km (land), 3.4 sq km (water) Zip code(s): 49712