The Thousand Islands are a chain of over 1,865 islands located in the Saint Lawrence River along the US-Canada border as it exits Lake Ontario. The islands range significantly in size from over 100 square kilometers to small rocky outcroppings. They stretch for about 80 kilometers downstream from Kingston, Ontario and include islands that are part of both Canada and the United States.

1. Canadian islands are
The Thousand
in the province of
Islands are a
Ontario. The U.S.
chain of islands
islands are in the
that straddle the
state of New York.
U.S-Canada
The islands, which
border in the
number 1,865 in all,
Saint Lawrence
range in size from
River as it
over 100 km²
emerges from the
(40 sq mi) to smaller
northeast corner
islands occupied by a
of Lake Ontario.
single residence, to
The islands
even smaller
stretch for about
uninhabited
50 mi (80 km)
outcroppings of rocks
downstream
that are home to
from Kingston,
migratory waterfowl.
Ontario
The number of islands was determined using the criteria that any island
must be above water level for 365 days per year, bigger than one square
foot (roughly 900 cm²), and support at least one tree or shrub.
The area is very popular among vacationers, campers, and boaters, and is
often referred to as the 'fresh water boating capital of the world.'