The Question:

How long is Australia's coastline? Is it the longest in the world?

The Answer:

Australia's coastline is 25,760 kilometers, or a little over 16,000 miles, long.

No. It is not the longest in the world. Canada is the country with the longest coastline (152,100 miles) and Monaco has the shortest coastline (3.5 miles).

Here are links to those countries' pages on infoplease.com:

—The Fact Monster