Which lake is on the border between chad and cameroon?

The correct answer is - Lake Chad.

The lake that is located on the border between the two Central African nations of Cameroon and Chad is the Lake Chad. This lakes forms very small portion of the border between these two nations, and it is located in the northernmost part of the border.

This lake is a large, shallow, endorheic lake. It is located on the edge of the Sahara desert, in the Chad Basin, and it is the largest lake in this basin. Lake Chad has experienced very big variations in its water levels, losing around 95% of its waters between the early 1960's and late 1990's.

This lake is of huge importance to the region, as it is providing water for more than thirty million people from four different countries located around it.