The basin extends into 11 states viz.

The basin extends into the southern part of the Barents sea and includes Kolguyev Island.

However the surrounding basin extends for a diameter of over 600 km.

The basin itself extends from Rockland County in the southern tip of New York to south-eastern Pennsylvania.

The basin covers most of Illinois, and extends into western Indiana and western Kentucky.

Its basin extends to about 491,000 km2.

The Oatka's basin is relatively narrow and does not extend far from the Oatka Valley or the towns through which the creek itself flows.

The basin extends further south along the West Fork than it does along the East Fork.

Through the middle of 1985, this basin extended westward to 80E.

The basin extends to the coastline of Espírito Santo.