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Arapahoe County Facts
Arapahoe County was named for the Arapaho Indians
who had inhabited eastern Colorado. Originally, the county extended
all the way to the Kansas/Colorado border. November, 1858 Denver
citizens formed the independent government of Arapahoe County
within Kansas Territory and elected a delegate.
Colorado Territory was established by Congress
on February 28, 1861. The first Legislative Assembly of the Territory
of Colorado convened on September 9, 1861. They quickly enacted
laws establishing the seventeen original counties. They
were Arapahoe, Boulder, Clear Creek, Costilla, Douglas, El Paso,
Fremont, Gilpin, Guadalupe (later named Conejos), Huerfano, Jefferson,
Lake, Larimer, Park, Pueblo, Summit and Weld.
- Denver was Arapahoe’s County Seat in 1861
- In 1902, Arapahoe county split and created Denver
and Adams Counties, and sent parts of Arapahoe County to Washington
and Yuma Counties.
- 1904 Littleton defeats Englewood, 1,310 votes to
829, in an election to determine the permanent Arapahoe County
seat.
- 1913 - Denver - Colorado swore in its first woman
elected to serve in the State Senate. She was Helen R. Robinson,
R - Arapahoe County.
- 1910 Census: Arapahoe County Population = 10,263
- 1920 Census: Arapahoe County Population = 13,766
- 1930 Census: Arapahoe County Population = 22,647
- 1940 Census: Arapahoe County Population = 32,150
- 1950 Census: Arapahoe County Population = 52,125
- 1960 Census: Arapahoe County Population = 113,426
- 1970 Census: Arapahoe County Population = 162,142
- 1980 Census: Arapahoe County Population = 293,621
- 1990 Census: Arapahoe County Population = 391,511
- 2000 Census: Arapahoe County Population = 487,967
- 2001 Estimated Arapahoe County Population = 500,785
- Land Area = 803 square miles (year 2000)
- Population Density = 607.6 people per square mile
(year 2000)
Census information source: http://www.census.gov/population/cencounts/co190090.txt
and http://quickfacts.census.gov/qfd/states/08/08005.html
Land area and population density source: http://quickfacts.census.gov/qfd/states/08/08005.html
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