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LONE TREE VS.
KEYSTONE
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2025 Compare Cities People:
Lone Tree, CO vs Keystone, SD
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Highlights
- Keystone is 0% more densely populated than Lone Tree.
- People are 10.2% less likely to be married in Keystone.
- The Median Age is 4.4 years younger in Keystone.
Lone Tree, CO
Keystone, SD
United States
Population
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469
329,725,481
Female Population
50.7%
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50.5%
Male Population
49.3%
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49.5%
Median Age
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36.8
38.4
space3
Population - 2010
10,279
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309,327,143
Population - 2000
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311
285,036,114
Population - 1990
2,527
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251,960,433
Pop. 2000 to Now
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13.2%
15.6%
Pop. 1990 to Now
438.7%
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30.8%
space4
Population Density
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164.0
93.4
Land Area
9.8
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3,531,905.4
Water Area
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0.0
264,836.8
space
Est. Total Population By Age
Lone Tree, CO
Keystone, SD
United States
Age 0 to 4
3.6%
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5.9%
Age 5 to 9
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11.1%
6.1%
Age 10 to 14
7.3%
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6.6%
Age 15 to 17
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5.8%
3.9%
Age 18 to 20
2.4%
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4.0%
Age 21 to 24
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9.6%
5.2%
Age 25 to 34
14.4%
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13.8%
Age 35 to 44
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22.4%
12.9%
Age 45 to 54
14.9%
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12.6%
Age 55 to 59
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4.1%
6.7%
Age 60 to 64
5.9%
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6.3%
Age 65 to 74
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6.2%
9.6%
Age 75 to 84
3.5%
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4.5%
Age 85 and over
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0.6%
1.9%
space1
Race
Lone Tree, CO
Keystone, SD
United States
White
78.1%
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59.4%
Black
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0.0%
12.2%
Asian
8.1%
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5.6%
Native American
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1.7%
0.6%
Hawaiian, Pacific Islander
0.1%
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0.2%
Other
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0.9%
0.4%
Two or More Races
3.2%
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3.2%
Hispanic
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22.2%
18.4%
space2
Marriage & Family
Lone Tree, CO
Keystone, SD
United States
Married Population
57.5%
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49.8%
Currently Married
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51.7%
48.0%
Married but Separated
0.8%
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1.8%
Single Population
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48.3%
50.2%
Never Married
28.2%
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33.8%
Divorced
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21.0%
10.8%
Widowed
2.9%
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5.6%
space5
Household Size
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3.03
2.60
Households
5,991
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124,010,992
Family Households
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102
80,755,759
Married couple, w/children
33.4%
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30.5%
Married couple, no children
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39.2%
42.9%
Non Family Households
2,427
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43,255,233
Single householder, w/children
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8.8%
15.8%
Single householder, no children
3.2%
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10.8%
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Learn More About Lone Tree, Colorado
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