What Is the Largest State in the United States?

Key Facts at a Glance

The largest state in the United States by both total area and land area is Alaska. Below is a concise overview of its key attributes, with verified context and meaningful comparisons to help clarify how its size and other characteristics shape its role among U.S. states.

What Defines a U.S. State’s Size

When comparing U.S. states by size, total area is the standard metric. Total area includes both land and inland water, such as lakes, rivers, and reservoirs within state boundaries. Land area measures only the dry land and inland water that is under state jurisdiction, excluding coastal waters and territorial seas. Water area covers lakes, reservoirs, rivers, and coastal waters within the state. Comparing only land area yields a similar ranking, but total area more consistently captures a state’s geographic footprint. Alaska leads both rankings by a very large margin.

Why Size Rankings Rarely Change

State boundaries in the United States are generally fixed, making changes to area extremely uncommon. Adjustments can occur through legislative action, interstate compacts, or, in rare historical cases, surveying corrections. In modern times, no state has altered its land area in a way that changes its rank. As a result, size-based comparisons among states are exceptionally durable over time.

How Large Is Alaska in Context

At approximately 665,384 square miles of total area, Alaska is notably larger than the next three largest states combined. To visualize its scale, it is more than double the size of Texas, the second largest state. It is also larger than the combined areas of California, Montana, and New Mexico. Internationally, Alaska’s total area is comparable to that of Iran, or slightly smaller than the combined area of Mexico and Central American countries. These comparisons highlight how Alaska’s size stands out not only within the country but also globally.

Population and Settlement Patterns

Despite its vast area, Alaska has a relatively small population. Sparse settlement, long distances between communities, and challenging climate and terrain limit large-scale population concentration. Most residents live in the southeast coastal panhandle or in the Anchorage region in the southcentral part of the state. The interior holds smaller towns and villages, often accessible only by air or seasonal roads. This settlement pattern contributes to Alaska’s very low population density, reinforcing how size alone does not equate to population concentration.

Population Density and Settlement

• Anchorage is home to roughly 40 percent of the state’s population but covers only a small fraction of its land.
• Many rural communities rely on aviation and seasonal transportation, given limited road access.
• Extreme weather, permafrost, and long periods of daylight or darkness shape daily life and infrastructure planning.

Geography, Climate, and Environment

Alaska’s geography ranges from coastal plains and temperate rainforests in the southeast to arctic tundra in the far north. It contains vast mountain ranges, including parts of the Alaska Range, and active glaciers. The state has an extensive coastline along the Arctic Ocean, the Bering Sea, and the Pacific Ocean. Its climate spans subarctic and maritime zones, with long, harsh winters and short, cool summers. This varied landscape supports rich biodiversity, including large populations of birds, marine mammals, and fish.

Economy and Resources

Alaska’s economy is heavily influenced by natural resource extraction, including oil, natural gas, and minerals. The state receives substantial revenue from resource development, which supports government services and a Permanent Fund that distributes annual dividends to eligible residents. Fishing and tourism also contribute meaningfully to the economy. However, the small population and high costs of doing business in remote areas mean that traditional measures of economic output, such as gross state product per capita, require careful interpretation when compared to larger, more populous states.

How Alaska Compares to Other States

Size comparisons are most informative when placed alongside direct neighbors in the rankings. The table below compares Alaska to the next four largest states by total area, providing both metric and imperial values for clarity.

Table: Size comparison among the five largest U.S. states by total area

As shown, Alaska is approximately 2.5 times the size of Texas and more than four times the size of California. These differences illustrate why Alaska is consistently identified as the largest state and why such distinctions remain meaningful in geography, logistics, and planning.

Summary

Alaska is the largest U.S. state by total area, covering about 665,384 square miles. Its land area accounts for the vast majority of this, with water making up a smaller but significant portion. It is more than double the size of Texas and larger than the next three states combined. While its population is small relative to its area, its economy, environment, and unique geography continue to define its lasting role among U.S. states.