Lower 48 States 2021

The United States is made up of 50 states, but 48 states – also known as the conterminous states, the lower 48, or the contiguous states – are adjoined.

Two of the states – Alaska and Hawaii – are not part of the lower 48 states. This is because Alaska is separated by British Columbia, Canada, and Hawaii is an island. Washington, D.C., is also part of the contiguous United States, although it is not an official state. The contiguous United States is not to be confused with the continental U.S., which includes the state of Alaska.

The lower 48 states, along with D.C., have an area of over 3.1 million square miles. Water makes up over 160,000 square miles or over 62% of the world’s total water area. The remainder is land area and is similar to the size of Australia.

Based on census data from 2010, over 306 million people live in the contiguous United States. This makes up over 99% of the country’s total population. The population density of just the lower 48 states is over 103 people per square mile.

Lower 48 States 2021

State 2021 Pop.
Alabama4,934,190
Arizona7,520,100
Arkansas3,033,950
California39,613,500
Colorado5,893,630
Connecticut3,552,820
Delaware990,334
Florida21,944,600
Georgia10,830,000
Idaho1,860,120
Illinois12,569,300
Indiana6,805,660
Iowa3,167,970
Kansas2,917,220
Kentucky4,480,710
Louisiana4,627,000
Maine1,354,520
Maryland6,065,440
Massachusetts6,912,240
Michigan9,992,430
Minnesota5,706,400
Mississippi2,966,410
Missouri6,169,040
Montana1,085,000
Nebraska1,952,000
Nevada3,185,790
New Hampshire1,372,200
New Jersey8,874,520
New Mexico2,105,000
New York19,300,000
North Carolina10,701,000
North Dakota770,026
Ohio11,714,600
Oklahoma3,990,440
Oregon4,289,440
Pennsylvania12,804,100
Rhode Island1,061,510
South Carolina5,277,830
South Dakota896,581
Tennessee6,944,260
Texas29,730,300
Utah3,310,770
Vermont623,251
Virginia8,603,980
Washington7,796,940
West Virginia1,767,860
Wisconsin5,852,490
Wyoming581,075

Lower 48 States 2021