274 campgrounds with first-come sites in Oregon

The Forest Service runs most of them. Willamette National Forest and Mt. Hood National Forest hold more of them than anywhere else in the state. Sizes run from 1 to 279 sites.

A campground is listed when Recreation.gov or the Forest Service records it as first-come, first-served. Campgrounds where some sites book online and the rest are first-come are listed too, marked partly reservable.