Latitude Span of the United States

There is no single "latitude line" defining the United States. Instead, the country spans a vast latitudinal range of approximately 42 degrees—from the southern tip of Texas to the northern coast of Alaska.

Extreme Points

Key Latitudinal Benchmarks

• 24°30′ N – 49°30′ N: Contiguous U.S. (25° span)
• 18°55′ N – 71°23′ N: All 50 states (52° span)
• 38°00′ N: Approximate latitudinal center of contiguous U.S. (near Lebanon, Kansas)
• 45°00′ N: Halfway between equator and North Pole—crosses Oregon, Idaho, Montana, South Dakota, Minnesota, Wisconsin, Michigan, New York, Vermont, New Hampshire, Maine
• 49°00′ N: U.S.–Canada border from Minnesota to Pacific (except Northwest Angle)

Climate Implications

This enormous span explains America's climatic diversity: Key West (24.5° N) shares latitude with Sahara Desert, Mumbai, Hong Kong; Seattle (47.6° N) aligns with Paris, Vienna, Munich; Utqiaġvik/Barrow (71.3° N) matches Nordkapp, Norway. Yet ocean currents, topography, and air masses create vastly different climates at similar latitudes.

Historical Note

The 49th parallel boundary (1818 Convention, 1846 Oregon Treaty) and the 1853 Gadsden Purchase (setting the current southern border at ~31°30′ N) were diplomatic choices, not geographic imperatives. The U.S. latitudinal footprint reflects 19th-century expansionism more than natural boundaries.