Wanderlust World Wanderlust World North America is bounded by three major ocean basins. Note that the Arctic and Atlantic are technically oceans, not "seas," though they contain marginal seas.
Borders the northern coasts of Canada (Northwest Territories, Nunavut), Alaska (USA), Greenland (Denmark), and Russia. Key marginal seas: Beaufort Sea, Chukchi Sea, Lincoln Sea, Wandel Sea. Seasonal sea ice dominates; the Northwest Passage threads through Canadian Arctic Archipelago.
Borders eastern Canada (Labrador, Newfoundland, Maritime provinces), the U.S. East Coast (Maine to Florida), eastern Mexico (Gulf of Mexico), and the Caribbean islands. Major marginal seas: Gulf of Mexico, Caribbean Sea, Labrador Sea, Gulf of St. Lawrence, Bay of Fundy, Sargasso Sea.
Borders western Canada (British Columbia), the U.S. West Coast (Washington, Oregon, California), and western Mexico (Baja California, mainland). Marginal seas: Gulf of Alaska, Bering Sea (north), Gulf of California (Sea of Cortez), Salish Sea (Puget Sound/Strait of Juan de Fuca).
The question asks for "labeled seas." The primary ocean boundaries are as above. If listing marginal seas directly on the coastline: Beaufort, Chukchi, Bering (Arctic/Pacific transition); Gulf of Alaska, Salish Sea (Pacific); Gulf of California (Pacific); Gulf of Mexico, Caribbean Sea (Atlantic); Labrador Sea, Gulf of St. Lawrence (Atlantic).