Have made this a recent burger quest and eaten many all over town. Grew up near Helvetia Tavern who's burgers are good, and eat them often so the big bun standard to measure against for me - as the restaurant was co-owned with Helvetia (back in the Andy / Cindy days before they split) the Carver Hangar has nearly the same burger with great atmosphere where you can throw peanuts on the floor. The Carver Hanger still has a small pizza burger on their menu a favorite and will make them for me in a large size as a special request. Helvetia Tavern discontinued pizza burgers long ago as a cost savings when workers complained took too long to prepare when busy. The Carver Hangar large pizza burger with extra sauce is a favorite try to eat often, while not something 'normal'. So will focus on more normal burgers.
Also Used to go to Stanich's which was a favorite my grandfather introduced me to when a little kid living on that side of town. Stanich's closed two years ago and didn't know until tried to go a few months back. The Mad Greek Deli has a great burger and chicken sandwich in addition to their Mad Greek Sandwiches, Mad Americans, Greek fries, salads, deserts, etc.
The Lighthouse Restaurant in Linton has my absolute current favorite burger in Portland. For about $6.95 or so is a consistently good value never regret ordering. I always cut it in quarters as find big burgers easier to eat quartered. The Lighthouse burger has ham, egg, bacon, and all kinds of goodies so when not hungry enough take half home and find is good later - it seems tall and too big to eat when it gets to your table. The Lighthouse home made soups here are also a value and come in a huge bowl, so skip the the normal little cup here. Heinz and his wife who used to run the Gypsy in NW Portland downtown, who bought the Lighthouse from Rosie, recently sold the place but the cook is the same. Had a burger earlier this week that I so enjoyed wanted to share and see if anyone else knows of good burgers around stump town.
4915 NE Fremont St, Portland, OR 97213
Mad Greek Deli
18450 NW West Union Rd, Portland, OR 97229
10808 NW Saint Helens Rd, Portland, OR 97231
16196 SE Highway 224, Damascus, OR 97089