Oslo city's reference points are 59°55"N and 10°45"E, as far north as, for example, Helsinki, St. Petersburg, the northerly part of Kamchatka, Anchorage in Alaska and Kap Farvel in Greenland.

Its area covers 454 km2 (175 sq miles), with 242 km2 (93 sq miles) of forest, 8 km2 (3 sq miles) of parkland and recreational areas, and some 40 islands and 343 inland lakes.