how big is lake michigan

Lake Michigan is enormous: it covers about 22,300 square miles (around 57,800 square kilometers) of surface area, making it one of the largest freshwater lakes in the world by area.

Basic size facts

• Surface area : About 22,300 square miles (57,700–57,800 square kilometers).

• Length (north–south): Roughly 307–321 miles (about 494–517 kilometers).

• Maximum width (east–west): About 118 miles (190 kilometers).

• Average depth : About 279 feet (85 meters).

• Maximum depth : About 923 feet (281 meters).

• Shoreline length : About 1,640 miles (2,640 kilometers), including islands.

How it ranks globally

• Lake Michigan is the third-largest of the five Great Lakes by surface area (after Superior and Huron).

• It is often listed as the fifth-largest lake in the world by surface area.

• It is the largest lake entirely within one country , since all of it lies within the United States.

Size comparison snapshot

Here is a quick feel for its scale:

• Its surface area is similar to the combined size of Maryland, Delaware, and Massachusetts in the United States.

• The drainage basin (the land area that feeds water into the lake) is about 45,500–45,600 square miles (around 118,000 square kilometers), which is roughly double the lake’s own surface.

Fun “how big” perspectives

• Driving from the southern tip near Indiana/Illinois to the northern end in Michigan or Wisconsin is an all‑day road trip of several hundred miles.

• Standing on the shore in Chicago or Milwaukee, the opposite side is so far away (tens of miles) that it often looks like an ocean with no land visible on the horizon.

Information gathered from public forums or data available on the internet and portrayed here.