Johnson City, OR -- U.S. city in Oregon Population (2000): 634 Housing Units (2000): 286 Land area (2000): 0.057316 sq. miles (0.148448 sq. km) Water area (2000): 0.004212 sq. miles (0.010909 sq. km) Total area (2000): 0.061528 sq. miles (0.159357 sq. km) FIPS code: 37650 Located within: Oregon (OR), FIPS 41 Location: 45.404642 N, 122.580738 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Johnson City, OR Johnson City