Quick information summary of the O'Brien CDP area.
O'Brien CDP is located in the state of Oregon. It occupies the area of 6 square miles. 1 square miles are water areas and 6 square miles remain for land areas. Center of the O'Brien CDP lies at +42.0799768, -123.7041490 coordinates. According to the 2010 Census, there are 504 living in the O'Brien CDP. The racial makeup shows these 3 races as the most frequent : White (92.66%), American Indian and Alaska Native (3.57%) and Two or More races (0.99%). Median age is 54 for the males and 52 for the females.