It is a matter of personal preference
the u.s. got Oregon from Britain in 1846.
The US Postal Service recognizes OR for the state of Oregon.
The state of Oregon is situated in the USA, not Canada.
1859
Oregon
Oregon
Oregon
On February 14th 1859 Oregon became the 33rd state of the US.
Oregon was the thirty-third state to join the Union.
Oregon is a US State and does not contain other states.
Alabama, Massachusetts and Oregon.
Crater Lake National Park is located in the US state of Oregon.