| Monogram | Town | Description | Location |
| A | Adrian | | 43°44′13″N 117°05′36″W / 43.737°N 117.0934°W / 43.737; -117.0934 (Adrian) |
| A | Arlington | | 45°43′18″N 120°11′56″W / 45.7216°N 120.1988°W / 45.7216; -120.1988 (Arlington) |
| B | Baker | | 44°46′44″N 117°53′23″W / 44.779°N 117.8896°W / 44.779; -117.8896 (Baker) |
| B | Barview | | 45°34′19″N 123°56′23″W / 45.572°N 123.9397°W / 45.572; -123.9397 (Barview) |
| B | Bonanza | Bonanza Jr./Sr. High School | 42°11′06″N 121°24′20″W / 42.1851005°N 121.4056637°W / 42.1851005; -121.4056637 (Bonanza) |
| BR | Unity | Burnt River School | 44°27′24″N 118°12′24″W / 44.4567°N 118.2068°W / 44.4567; -118.2068 (Burnt River School) |
| CHS (uncertain existence) | Condon | Condon High School | 45°14′15″N 120°11′05″W / 45.2374°N 120.1846°W / 45.2374; -120.1846 (Condon High School) (uncertain location) |
| C | Crane | | 43°25′20″N 118°34′30″W / 43.4222°N 118.5749°W / 43.4222; -118.5749 (Crane) |
| C | Culver | | 44°29′00″N 121°13′24″W / 44.4833°N 121.2234°W / 44.4833; -121.2234 (Culver) |
| CC | Prineville | Crook County High School | 44°17′34″N 120°50′00″W / 44.2928°N 120.8332°W / 44.2928; -120.8332 (Crook County High School) |
| D (uncertain existence) | The Dalles | The Dalles High School | 45°35′45″N 121°11′16″W / 45.5957°N 121.1879°W / 45.5957; -121.1879 (Dalles High School) (uncertain location) |
| D | Dayville | | 44°28′33″N 119°30′38″W / 44.4758°N 119.5105°W / 44.4758; -119.5105 (Dayville) |
| D | Dufur | | 45°27′29″N 121°08′19″W / 45.458°N 121.1387°W / 45.458; -121.1387 (Dufur) |
| E | Elgin | | 45°34′07″N 117°54′21″W / 45.5686°N 117.9057°W / 45.5686; -117.9057 (Elgin) |
| E | Eugene | Eugene High School (Now South Eugene High School) | 44°03′28″N 123°05′41″W / 44.0578°N 123.09478°W / 44.0578; -123.09478 (Eugene) |
| G | Garibaldi | | 45°33′44″N 123°55′12″W / 45.5623°N 123.9201°W / 45.5623; -123.9201 (Garibaldi) |
| H | Harper | | 43°50′59″N 117°35′51″W / 43.8496°N 117.5974°W / 43.8496; -117.5974 (Harper) |
| H | Klamath Falls | Henley High School | 42°12′36″N 121°41′49″W / 42.21°N 121.697°W / 42.21; -121.697 (Henley High School) |
| HL | Hot Lake | | 45°14′33″N 117°57′35″W / 45.2426°N 117.9597°W / 45.2426; -117.9597 (Hot Lake) |
| H | Huntington | | 44°21′40″N 117°15′47″W / 44.361°N 117.2631°W / 44.361; -117.2631 (Huntington) |
| I | Imnaha | | 45°33′36″N 116°50′16″W / 45.5601°N 116.8377°W / 45.5601; -116.8377 (Imnaha) (uncertain location) |
| I | Ione | | 45°29′50″N 119°49′38″W / 45.4973°N 119.8273°W / 45.4973; -119.8273 (Ione) |
| JV | Jordan Valley | | 42°58′44″N 117°03′28″W / 42.9788°N 117.0577°W / 42.9788; -117.0577 (Jordan Valley) |
| K | Klamath Falls | Klamath Union High School | 42°14′20″N 121°46′10″W / 42.239°N 121.7695°W / 42.239; -121.7695 (Klamath Falls) |
| L (no longer exists) | La Grande | | 45°19′14″N 118°06′40″W / 45.3206°N 118.111°W / 45.3206; -118.111 (La Grande) |
| L | Lakeview | | 42°12′03″N 120°20′07″W / 42.2008°N 120.3353°W / 42.2008; -120.3353 (Lakeview) |
| LR | Merrill | Lost River Jr./Sr. High School | 42°01′33″N 121°31′17″W / 42.025805°N 121.5213427°W / 42.025805; -121.5213427 (Lost River) |
| M | Madras | | 44°37′57″N 121°08′18″W / 44.6325°N 121.1383°W / 44.6325; -121.1383 (Madras) |
| M | Mapleton | | 44°02′15″N 123°51′09″W / 44.0374°N 123.8525°W / 44.0374; -123.8525 (Mapleton) |
| M | Klamath Falls | Mazama High School | 42°13′32″N 121°42′17″W / 42.2256°N 121.7046°W / 42.2256; -121.7046 (Mazama High School) |
| M (uncertain existence) | Milton-Freewater | | 45°56′23″N 118°23′44″W / 45.9398°N 118.3956°W / 45.9398; -118.3956 (Milton-Freewater) (uncertain location) |
| M | Mitchell | | 44°34′07″N 120°09′10″W / 44.5686°N 120.1528°W / 44.5686; -120.1528 (Mitchell) |
| M | Monument | | 44°49′26″N 119°25′05″W / 44.8240°N 119.4181°W / 44.8240; -119.4181 (Monument) |
| MV | Mount Vernon | | 44°25′28″N 119°07′06″W / 44.4244°N 119.1184°W / 44.4244; -119.1184 (Mount Vernon) |
| O | Oakridge | | 43°45′02″N 122°28′01″W / 43.7506°N 122.4670°W / 43.7506; -122.4670 (Oakridge) |
| OT | Klamath Falls | Oregon Institute of Technology | 42°15′49″N 121°47′00″W / 42.2636°N 121.7832°W / 42.2636; -121.7832 (Oregon Institute of Technology) |
| P | Paisley | | 42°41′32″N 120°34′24″W / 42.6922°N 120.5733°W / 42.6922; -120.5733 (Paisley) |
| P (largely overgrown) | Portland | University of Portland |
45°34′13″N 122°43′33″W / 45.5703°N 122.7257°W / 45.5703; -122.7257 (University of Portland) |
| P | Prairie City | | 44°27′56″N 118°42′26″W / 44.4656°N 118.7071°W / 44.4656; -118.7071 (Prairie City) |
| RR | Rogue River | | 42°27′06″N 123°09′26″W / 42.4518°N 123.1571°W / 42.4518; -123.1571 (Rogue River) |
| SWC | Maupin | South Wasco County High School | 45°10′53″N 121°04′32″W / 45.1815°N 121.0755°W / 45.1815; -121.0755 (South Wasco County High School) |
| O | Eugene | University of Oregon | 44°03′28″N 123°05′34″W / 44.0577°N 123.0927°W / 44.0577; -123.0927 (University of Oregon) |
| V | Vale | | 43°58′45″N 117°13′36″W / 43.9793°N 117.2266°W / 43.9793; -117.2266 (Vale) |
| W (uncertain existence) | The Dalles | Wahtonka High School | 45°37′30″N 121°13′27″W / 45.6249°N 121.2243°W / 45.6249; -121.2243 (Wahtonka High School) (uncertain location) |
| W | Wallowa | | 45°34′39″N 117°31′20″W / 45.5775°N 117.5221°W / 45.5775; -117.5221 (Wallowa) |
| WARM SPRINGS | Warm Springs | | 44°46′07″N 121°16′07″W / 44.7685°N 121.2686°W / 44.7685; -121.2686 (Warm Springs) |