United States Edit
The Federal Government owns almost 30 percent of the land area of the United States. This is close to 650-million acres (263 million hectares). These public lands include National Parks and National Mounments, National Forests, National Wildlife Refuges, the BLM lands, the military lands and the Indian Reservations. 
- http://en.wikipedia.org/wiki/Bureau_of_Land_Management - administers American public lands, totaling approximately 247.3 million acres = 100 million hectares
- http://en.wikipedia.org/wiki/United_States_Forest_Service - administers 193 million acres = 78 million hectares
- http://en.wikipedia.org/wiki/Land_ownership_in_Canada - About 89% of Canada's land area (8,886,356 km²) is Crown Land, which may either be federal (41%) or provincial (48%); the remaining 11% is privately owned
- http://fr.wikipedia.org/wiki/Surface_agricole_utile#En_France - La SAU française 3 représente environ 29 millions d'hectares, soit environ la moitié (54) % du territoire national.