This is a list of hillside letters (also known as mountain monograms) in the U.S. state of Oregon. There are at least 39 hillside letters, acronyms, and messages in the state, possibly more; primarily in small towns in the arid eastern half of the state.

Monogram Town Description Location A Adrian A Arlington B Baker B Barview B Bonanza Bonanza Jr./Sr. High School BR Unity Burnt River School CHS (uncertain existence) Condon Condon High School (uncertain location) C Crane C Culver CC Prineville Crook County High School D (uncertain existence) The Dalles The Dalles High School (uncertain location) D Dayville D Dufur E Elgin E Eugene Eugene High School (Now South Eugene High School) G Garibaldi H Harper H Klamath Falls Henley High School HL Hot Lake H Huntington I Imnaha (uncertain location) I Ione JV Jordan Valley K Klamath Falls Klamath Union High School L (no longer exists) La Grande L Lakeview LR Merrill Lost River Jr./Sr. High School M Madras M Mapleton M Klamath Falls Mazama High School M (uncertain existence) Milton-Freewater (uncertain location) M Mitchell M Monument MV Mount Vernon O Oakridge OT Klamath Falls Oregon Institute of Technology P Paisley P (largely overgrown) Portland University of Portland P Prairie City RR Rogue River SWC Maupin South Wasco County High School O Eugene University of Oregon V Vale W (uncertain existence) The Dalles Wahtonka High School (uncertain location) W Wallowa WARM SPRINGS Warm Springs

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