Dayville, OR -- U.S. town in Oregon Population (2000): 138 Housing Units (2000): 77 Land area (2000): 0.512059 sq. miles (1.326227 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.512059 sq. miles (1.326227 sq. km) FIPS code: 18300 Located within: Oregon (OR), FIPS 41 Location: 44.466662 N, 119.533356 W ZIP Codes (1990): 97825 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dayville, OR Dayville