Alabama
Delaware
When comparing countries with a coastline, Sint Maarten has the shortest in existence. Monaco has the third shortest coastline.
Alberta
England
New Hampshire
Slovenia
Countries with the shortest coastlines are countries without a coastline, so ones with 0 km. However, the five countries with the shortest actual coastline are Monaco, Bosnia & Herzegovina, Tuvalu, Jordan, and Nauru in that order.
"Monaco has the world's shortest coastline. a total of three kilometres" Altough the smallest coastline does belong to Monaco the smallest coastline relative to size in fact belongs to Bosnia and Herzegovina at 24.5km long. It centered around the only coast town in the country, Nuem.
Canada is the country with the longest coastline (152,100 miles) and Monaco has the shortest coastline (3.5 miles).
England (by the way, it's shorter)
Maine.