The five great lakes called Superior, Michigan, Huron, Erie, and Ontario, form the largest group of freshwater lakes on Earth by total area. This collection of massive bodies of water holds approximately 21% of the world's surface fresh water, making them a critical resource for North America. Understanding their names and individual characteristics is the first step to appreciating their immense environmental and economic value.
The Core Five: Names and Basic Identity
When people ask what are the five great lakes called, the immediate answer is a specific list defined by the Boundary Waters Treaty of 1909. These lakes are not ranked by popularity but by a combination of size, drainage basin, and natural connectivity. They function as a single hydrological system, linked by rivers and canals, yet each maintains a unique identity. Memorizing the sequence from largest to smallest helps in understanding their scale and importance.
Lake Superior: The Largest and Coldest
Lake Superior is the largest of the five great lakes called, both in terms of surface area and volume. It holds more water than all of the other lakes combined, and its depth creates a cold, deep blue environment. The lake borders Minnesota, Wisconsin, and Michigan in the United States, and the Canadian province of Ontario. Famous for its shipwrecks and harsh weather, Superior acts as the primary water source for the entire system.
Lake Michigan: The Sole American Lake
Lake Michigan is the only one of the five great lakes called that lies entirely within the United States. It borders four states—Illinois, Indiana, Michigan, and Wisconsin—making it a central recreational and industrial hub. Its shoreline is heavily populated, including major cities like Chicago and Milwaukee. Despite being the second largest by surface area, it is the third largest by volume, holding a significant portion of the region's freshwater.
Connecting Waterways and Shared Borders
To fully answer what are the five great lakes called, one must understand how they connect. Water flows from Superior into Lake Michigan and Lake Huron, which are technically connected by the Straits of Mackinac. Huron then drains into Lake Erie, the shallowest of the group, before the water cascades over Niagara Falls to fill Lake Ontario. This continuous flow means that an action in Minnesota can eventually impact the shores of New York.
Lake Huron: The Georgian Bay Giant
Lake Huron shares the same water level as Lake Michigan, effectively making them one lake connected by a narrow channel. However, Huron is distinct due to its massive Georgian Bay, which features thousands of islands and complex shorelines. The lake borders Michigan and Ontario, and it contains some of the oldest lighthouses and navigational hazards in the world. Its watershed is the largest of any of the great lakes.
Lake Erie: The Warm and Shallow Frontier
Lake Erie is the fourth largest by surface area but the shallowest, which results in it warming up quickly in the summer. This warmth supports a massive fishery and a bustling tourism industry along its shores in Ohio, Pennsylvania, New York, and Ontario. Because it is the southernmost and most agriculturally surrounded, Erie often faces significant challenges regarding water quality and algal blooms, making conservation efforts critical.
Lake Ontario: The Final Gateway
Lake Ontario serves as the final link in the chain of the five great lakes called. It is the smallest by surface area but deeper than Erie, creating a vital transition zone between the upper and lower lakes. The Saint Lawrence River drains this lake, lowering the water level to control flow and eventually sending the water to the Atlantic Ocean. Major cities like Toronto and Rochester rely on its consistent waters for commerce and drinking supply.
