To officially clarify, the law only permits self-serve in counties where the population is 40,000 or less, and distinguishes between "Eastern Oregon" counties (basically defined as anything east of the Willamette Valley) and low population counties elsewhere in the state (mostly on the coast).
Here is the text of it.
The following counties can offer 24-hour self-serve--"nonretail" facilities are also included (in order of 2016 population, from lowest to highest):
- Wheeler (1,465)
- Sherman (1,795)
- Gilliam (1,980)
- Wallowa (7,140)
- Harney (7,320)
- Grant (7,410)
- Lake (8,015)
- Morrow (11,745)
- Baker (16,510)
- Crook (21,580)
- Jefferson (22,790)
- Hood River (24,735)
- Wasco (26,700)
- Union (26,745)
- Malheur (31,705)
The coastal counties that meet the population requirement can offer self-serve between 6pm and 6am:
- Curry (22,600)
- Tillamook (25,900)
- Clatsop (38,225)
If any of the "Eastern Oregon" counties above grows beyond 40,000 population, it is then subject to the coastal rules. Those stations must also have an attendant on duty if they have a convenience store or other non-automotive business open on-site between 6am and 6pm.
The following counties don't have self-serve:
- Lincoln (47,735)
- Columbia (50,795)
- Coos (63,190)
- Klamath (67,410)
- Polk (79,730)
- Umatilla (79,880)
- Josephine (84,675)
- Benton (91,320)
- Yamhill (104,990)
- Douglas (110,395)
- Linn (122,315)
- Deschutes (176,635)
- Jackson (213,765)
- Marion (333,950)
- Lane (365,940)
- Clackamas (404,980)
- Washington (583,595)
- Multnomah (790,670)
As an Oregonian, my main issue with self-serve has been the fact that I've generally preferred to fill my tank and pay cash, which only really works well with an attendant. Self-serve stations want you to pay before pumping, and if you're paying with cash, you have to know exactly how much you'd need to fill the tank, or else you'll end up underfilling or overpaying.
My cash-based habits have been breaking down due to Costco, however, and I did finally start to see some of the appeal of self-serve when I drove through Nevada and Arizona this past September.