Maps of Northern California are located online at MapsofWorld.com and for sale on OmniMaps.com. Maps.com offers a Northern California wall map from 1966, but all its other maps cover the whole state.
MapsofWorld.com's map of Northern California shows the area's counties, its borders with Oregon and Nevada, and California's state capital Sacramento. Visitors to the site can print the map for free.
OmniMaps.com offers numerous atlases and road maps of the whole of California, but only two maps, one by National Geographic and the other by Rand McNally, that feature just Northern California. OmniMaps.com also offers individual maps of Northern Californian cities such as San Francisco and Fresno, and natural areas such as Yosemite National Park and Lake Tahoe.