2025 Compare Cities People:
San Ramon, CA vs Decatur, IL

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Highlights
- Decatur is 0% more densely populated than San Ramon.
- People are 33.5% less likely to be married in Decatur.
- The Median Age is 0.7 years younger in Decatur.
 San Ramon, CADecatur, ILUnited States
 Population  Unlock71,309329,725,481
 Female Population50.0%  Unlock50.5%
 Male Population50.0%  Unlock49.5%
 Median Age  Unlock39.938.4
 space3
 Population - 201071,784  Unlock309,327,143
 Population - 2000  Unlock81,860285,036,114
 Population - 199035,303  Unlock251,960,433
 Pop. 2000 to Now  Unlock-14.5%15.6%
 Pop. 1990 to Now134.7%  Unlock30.8%
 space4
 Population Density  Unlock1,685.093.4
 Land Area18.7  Unlock3,531,905.4
 Water Area  Unlock4.7264,836.8
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 Est. Total Population By Age
 San Ramon, CADecatur, ILUnited States
 Age 0 to 45.2%  Unlock5.9%
 Age 5 to 9  Unlock5.5%6.1%
 Age 10 to 149.8%  Unlock6.6%
 Age 15 to 17  Unlock3.7%3.9%
 Age 18 to 203.0%  Unlock4.0%
 Age 21 to 24  Unlock5.2%5.2%
 Age 25 to 348.2%  Unlock13.8%
 Age 35 to 44  Unlock11.3%12.9%
 Age 45 to 5418.6%  Unlock12.6%
 Age 55 to 59  Unlock7.0%6.7%
 Age 60 to 644.7%  Unlock6.3%
 Age 65 to 74  Unlock11.1%9.6%
 Age 75 to 843.4%  Unlock4.5%
 Age 85 and over  Unlock3.3%1.9%
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 Race
 San Ramon, CADecatur, ILUnited States
 White35.9%  Unlock59.4%
 Black  Unlock23.0%12.2%
 Asian47.6%  Unlock5.6%
 Native American  Unlock0.2%0.6%
 Hawaiian, Pacific Islander0.5%  Unlock0.2%
 Other  Unlock0.1%0.4%
 Two or More Races5.0%  Unlock3.2%
 Hispanic  Unlock2.8%18.4%
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 Marriage & Family
 San Ramon, CADecatur, ILUnited States
 Married Population63.9%  Unlock49.8%
     Currently Married  Unlock41.1%48.0%
 Married but Separated0.9%  Unlock1.8%
 Single Population  Unlock57.5%50.2%
 Never Married25.4%  Unlock33.8%
 Divorced  Unlock14.0%10.8%
 Widowed3.3%  Unlock5.6%
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 Household Size  Unlock2.212.60
 Households29,084  Unlock124,010,992
 Family Households  Unlock16,33580,755,759
     Married couple, w/children53.1%  Unlock30.5%
     Married couple, no children  Unlock48.1%42.9%
 Non Family Households6,137  Unlock43,255,233
     Single householder, w/children  Unlock20.0%15.8%
     Single householder, no children5.7%  Unlock10.8%
Reviews for San Ramon    17 Reviews

Over 13 years ago

If you like the weather hot and dry, this is the place for you! Don't come here if you like to see green hills in the summer,if you don't care for sunshine for 7-8  More

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Over 14 years ago

For what you get, "it" does not live up to the premium you have to pay to get "it".!  More

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good climate i expirenced in us is san ramon i am very happy to stay in that  More

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Reviews for Decatur    14 Reviews

I was sent here by the company I worked for in the '90's and was not initially impressed with midwest living. However, over the years I got used to living in the "Pride  More

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I grew up in Decatur and I still have family there, but it depresses me to see what it has become. It has a high unemployment rate, many business have closed or are run  More

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Over 14 years ago

If you enjoy drinking & driving, Decatur's fifteen drive-thru liquor windows, three times the # of drive-thru's than the ten largest cities in Illinois, COMBINED, will  More

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