U.S. states and territories by area (total, land, and water)

Definitions and measurement

Total area combines land plus inland and coastal water within state boundaries. Land area excludes those waters. Water area typically counts lakes, reservoirs, rivers, and coastal water inside territorial limits; in some cases this includes portions of the Great Lakes that lie within state jurisdiction. Different agencies may report slightly different values because of varying methods for coastal limits, tidal zones, or recent shoreline changes.

Notable rankings and characteristics

Alaska is by far the largest state in total area, land area, and water area. The next-largest state, Texas, is much smaller in comparison — roughly two fifths of Alaska's size — illustrating how uneven state areas can be. At the other extreme, Rhode Island is the smallest state by total and land area, and the District of Columbia occupies far less area than any state. Michigan stands out for water area because of its boundaries on the Great Lakes; its shoreline and inland lakes give it one of the highest water-area totals among states.

• Largest: Alaska (total, land, and water).
• Second-largest: Texas (about 40% of Alaska by total area).
• Smallest state: Rhode Island.
• Notable water area: Michigan ranks high due to the Great Lakes and inland waters.

Territories, the federal district, and special cases

Rankings that include the United States' territories list inhabited areas such as Puerto Rico, Guam, the U.S. Virgin Islands, American Samoa, and the Northern Mariana Islands alongside the states and the District of Columbia. These territories are typically much smaller in land area than the contiguous states, but they are included in comprehensive area comparisons for federal and geographical reference; see territorial listings at territory area tables. Many territories have greater proportions of water or coastal area relative to land.

History, boundaries, and causes of variation

State and territorial sizes reflect historical processes: colonial charters, international treaties, purchases such as the Louisiana Purchase and the acquisition of Alaska, natural features (rivers, mountain ranges, lakes), and later rectangular divisions established by surveyors in the western United States. These origins explain why some states have irregular shorelines and large water components while others have straight survey lines.

Practical importance and notable facts

Area matters for land management, transportation planning, conservation, and emergency response, but it does not determine political representation in Congress. Low population density is common in very large states; for example, Montana is larger than each of its neighboring states by land area, and only a few states (notably Alaska and Wyoming) have lower population densities. Scenic and economic differences also follow from area: large states can encompass diverse climates and resource bases, and states with extensive water area often have significant fisheries, shipping, and recreation industries.