The East Oregonian is a weekly newspaper published in Pendleton, Oregon, United States and covering Umatilla and Morrow counties.

[7] In 1881, C. S. "Sam" Jackson purchased a quarter interest in the Eastern Oregonian from Cox, and sold it back later that year for $250 more than he paid.

[7] Author George Stanley Turnbull described Jackson as "a character which has been one of the most influential in the history of Oregon journalism.

After one brawl with a reader, Jackson wrote: "A man who is afraid of bodily injury or personal attacks is not a newspaperman or capable of becoming one.

[6] Part of the announcement titled "He We Are" read "Unlike our new neighbor, the Daily East Oregonian is not started for campaign purposes.

"[6] At this time EO was "a powerful voice in the region" and Jackson went on to own and be publisher of the Oregon Journal in Portland.

[10] In June 2024, EO Media Group announced the East Oregonian will go from two to one print edition day each week.

Moving forward, EO will serve as a regional newspaper for all of northeastern Oregon and publish news from five newspaper that went online-only: The La Grande Observer, Blue Mountain Eagle, Hermiston Herald, Wallowa County Chieftain and Baker City Herald.