41st parallel north.html

The 41st parallel north is a circle of latitude that is 41 degrees north of the Earth's equatorial plane.

Starting at the Prime Meridian and heading eastwards, the parallel 41° north passes through:

Country, territory or sea	Notes
Spain
Mediterranean Sea
Italy	Islands of Asinara and Sardinia
Mediterranean Sea	Tyrrhenian Sea
Italy
Adriatic Sea
Albania
Macedonia
Greece
Turkey
Sea of Marmara
Turkey
Black Sea
Turkey
Black Sea
Turkey
Armenia
Azerbaijan	Yukhari Askipara exclave surrounded by Armenia
Armenia
Azerbaijan	Barkhudali exclave surrounded by Armenia
Armenia
Azerbaijan
Caspian Sea
Turkmenistan
Uzbekistan
Kazakhstan
Uzbekistan
Tajikistan
Uzbekistan
Kyrgyzstan
China
North Korea
Sea of Japan
Japan	Island of Honshū
Pacific Ocean
United States	California Nevada Utah Wyoming / Utah border Wyoming / Colorado border Nebraska / Colorado border Nebraska Iowa Illinois Indiana Ohio Pennsylvania New Jersey New York (mainland and Long Island)
Atlantic Ocean
Portugal
Spain

United States

In the United States, the parallel defines the southernmost border of Wyoming (bordering Utah and Colorado), and part of the border between Nebraska and Colorado.

As originally set by King Charles II of England in 1664, the point at which the 41st parallel crosses the Hudson River marks the northeastern border of New Jersey with New York. New Jersey's northern border then proceeds west to the eastern-most point of the Delaware River.

The 41st parallel was also one of the principal baselines used for surveying a portion of lands in Ohio. This marked the southern boundary of the Connecticut Western Reserve and the Firelands using the western boundary with Pennsylvania as the principal meridian. It also served as the baseline for a later survey of Ohio land north of the Greenville Treaty line up to the Fulton line which was the original boundary between Michigan and Ohio under the Northwest Ordinance (see the Toledo Strip). The later survey used the boundary with Indiana as the meridian.