2025 Compare Cities People:
Keystone, SD vs Tustin, CA

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Highlights
- Tustin is 0% more densely populated than Keystone.
- People are 1.7% more likely to be married in Tustin.
- The Median Age is 1.2 years younger in Tustin.
 Keystone, SDTustin, CAUnited States
 Population  Unlock79,895329,725,481
 Female Population45.6%  Unlock50.5%
 Male Population54.4%  Unlock49.5%
 Median Age  Unlock35.638.4
 space3
 Population - 2010334  Unlock309,327,143
 Population - 2000  Unlock67,504285,036,114
 Population - 1990232  Unlock251,960,433
 Pop. 2000 to Now  Unlock18.2%15.6%
 Pop. 1990 to Now51.7%  Unlock30.8%
 space4
 Population Density  Unlock7,185.593.4
 Land Area2.9  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Keystone, SDTustin, CAUnited States
 Age 0 to 46.6%  Unlock5.9%
 Age 5 to 9  Unlock6.2%6.1%
 Age 10 to 146.0%  Unlock6.6%
 Age 15 to 17  Unlock3.9%3.9%
 Age 18 to 201.1%  Unlock4.0%
 Age 21 to 24  Unlock5.3%5.2%
 Age 25 to 346.0%  Unlock13.8%
 Age 35 to 44  Unlock14.6%12.9%
 Age 45 to 5410.4%  Unlock12.6%
 Age 55 to 59  Unlock5.6%6.7%
 Age 60 to 645.8%  Unlock6.3%
 Age 65 to 74  Unlock7.3%9.6%
 Age 75 to 844.5%  Unlock4.5%
 Age 85 and over  Unlock1.5%1.9%
 space1
 Race
 Keystone, SDTustin, CAUnited States
 White66.1%  Unlock59.4%
 Black  Unlock2.3%12.2%
 Asian1.5%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.2%0.4%
 Two or More Races7.7%  Unlock3.2%
 Hispanic  Unlock40.0%18.4%
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 Marriage & Family
 Keystone, SDTustin, CAUnited States
 Married Population51.7%  Unlock49.8%
     Currently Married  Unlock50.0%48.0%
 Married but Separated0.0%  Unlock1.8%
 Single Population  Unlock47.5%50.2%
 Never Married26.5%  Unlock33.8%
 Divorced  Unlock8.5%10.8%
 Widowed0.8%  Unlock5.6%
 space5
 Household Size  Unlock2.972.60
 Households152  Unlock124,010,992
 Family Households  Unlock19,47780,755,759
     Married couple, w/children51.0%  Unlock30.5%
     Married couple, no children  Unlock36.6%42.9%
 Non Family Households50  Unlock43,255,233
     Single householder, w/children  Unlock15.4%15.8%
     Single householder, no children1.0%  Unlock10.8%
Reviews for Keystone    0 Reviews

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Reviews for Tustin    8 Reviews

There's no excitement in Tustin. Totally sleepy hollow place. Good  More

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I grew up in Tustin. The major pro is it has a small town feel with access to many choices of shops and restaurants. Don't let these negative Nancys fool you the  More

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Over 17 years ago

This is a great area for road cycling. Many streets have bike lanes, there are off-road bike paths going down to the beach, and the weather is great most of the year.   More

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