Statistical profiles of states along the
Lewis and Clark National Historic Trail

ILLINOIS
Area: 55,584 square miles
Population: 12,419,293
Percent change 1990-2000: 8.6
Persons per square mile: 223.4
Median household income: $41,179
Year admitted to the Union: 1818

MISSOURI
Area: 68,886 square miles
Population: 5,595,211
Percent change 1990-2000: 9.3
Persons per square mile: 81.2
Median household income: $34,502
Year admitted to the Union: 1821

KANSAS
Area: 81,815 square miles
Population: 2,688,418
Percent change 1990-2000: 8.5
Persons per square mile: 32.9
Median household income: $36,488
Year admitted to the Union: 1861

IOWA
Area: 55,869 square miles
Population: 2,926,324
Percent change 1990-2000: 5.4
Persons per square mile: 52.4
Median household income: $35,427
Year admitted to the Union: 1846

NEBRASKA
Area: 76,872 square miles
Population: 1,711,263
Percent change 1990-2000: 8.4
Persons per square mile: 22.3
Median household income: $35,337
Year admitted to the Union: 1867

SOUTH DAKOTA
Area: 75,885 square miles
Population: 754,844
Percent change 1990-2000: 8.5
Persons per square mile: 9.9
Median household income: $31,354
Year admitted to the Union: 1889

NORTH DAKOTA
Area: 68,976 square miles
Population: 642,200
Percent change 1990-2000: 0.5
Persons per square mile: 9.3
Median household income: $31,764
Year admitted to the Union: 1889

MONTANA
Area: 145,552 square miles
Population: 902,195
Percent change 1990-2000: 12.9
Persons per square mile: 6.2
Median household income: $29,672
Year admitted to the Union: 1889

IDAHO
Area: 82,747 square miles
Population: 1,293,953
Percent change 1990-2000: 28.5
Persons per square mile: 15.6
Median household income: $33,612
Year admitted to the Union: 1890

WASHINGTON
Area: 66,544 square miles
Population: 5,894,121
Percent change 1990-2000: 21.1
Persons per square mile: 88.6
Median household income: $41,715
Year admitted to the Union: 1889

OREGON
Area: 95,997 square miles
Population: 3,421,399
Percent change 1990-2000: 20.4
Persons per square mile: 35.6
Median household income: $37,284
Year admitted to the Union: 1859

USA
Area: 3,537,441 square miles
Population: 281,421,906
Percent change 1990-2000: 13.1
Persons per square mile: 79.6
Median household income: $37,005

Sources: U.S. Census Bureau, World Book Encyclopedia.

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