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2025 Compare Cities People:
San Marcos, TX vs Olney, IL

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Highlights
- Olney is 0% more densely populated than San Marcos.
- People are 55.2% more likely to be married in Olney.
- The Median Age is 15.4 years older in Olney.
 San Marcos, TXOlney, ILUnited States
 Population  Unlock8,996329,725,481
 Female Population52.5%  Unlock50.5%
 Male Population47.5%  Unlock49.5%
 Median Age  Unlock40.338.4
 space3
 Population - 201045,258  Unlock309,327,143
 Population - 2000  Unlock8,631285,036,114
 Population - 199028,743  Unlock251,960,433
 Pop. 2000 to Now  Unlock0.4%15.6%
 Pop. 1990 to Now130.8%  Unlock30.8%
 space4
 Population Density  Unlock1,297.993.4
 Land Area34.0  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 San Marcos, TXOlney, ILUnited States
 Age 0 to 43.7%  Unlock5.9%
 Age 5 to 9  Unlock5.3%6.1%
 Age 10 to 143.6%  Unlock6.6%
 Age 15 to 17  Unlock4.7%3.9%
 Age 18 to 2016.9%  Unlock4.0%
 Age 21 to 24  Unlock3.6%5.2%
 Age 25 to 3417.3%  Unlock13.8%
 Age 35 to 44  Unlock13.2%12.9%
 Age 45 to 546.6%  Unlock12.6%
 Age 55 to 59  Unlock5.1%6.7%
 Age 60 to 643.6%  Unlock6.3%
 Age 65 to 74  Unlock9.1%9.6%
 Age 75 to 841.9%  Unlock4.5%
 Age 85 and over  Unlock3.2%1.9%
 space1
 Race
 San Marcos, TXOlney, ILUnited States
 White45.2%  Unlock59.4%
 Black  Unlock1.0%12.2%
 Asian2.5%  Unlock5.6%
 Native American  Unlock0.1%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.8%0.4%
 Two or More Races3.1%  Unlock3.2%
 Hispanic  Unlock3.0%18.4%
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 Marriage & Family
 San Marcos, TXOlney, ILUnited States
 Married Population27.8%  Unlock49.8%
     Currently Married  Unlock41.1%48.0%
 Married but Separated1.6%  Unlock1.8%
 Single Population  Unlock56.8%50.2%
 Never Married61.2%  Unlock33.8%
 Divorced  Unlock19.8%10.8%
 Widowed2.8%  Unlock5.6%
 space5
 Household Size  Unlock2.462.60
 Households25,732  Unlock124,010,992
 Family Households  Unlock2,24680,755,759
     Married couple, w/children21.9%  Unlock30.5%
     Married couple, no children  Unlock38.7%42.9%
 Non Family Households14,680  Unlock43,255,233
     Single householder, w/children  Unlock24.4%15.8%
     Single householder, no children20.6%  Unlock10.8%
Voting
Reviews for San Marcos    6 Reviews
Randall · San Marcos, TX
Wish I had researched more before buying here
Over 2 years ago

An area with so much potential and existing natural beauty.Sadly bad urban planning is clearly obvious.Looks like fun for tens of thousands of students.However for the  More

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Elizabeth · San Marcos, TX
No Place Like Home
Over 16 years ago

San Marcos has the most beautiful people and places that I have ever seen throughout my travels. I love this city so much that I decided to settle down here and start a  More

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Alisha · Sandpoint, ID
Fun college town
Over 17 years ago

I spent several summers and a couple winters in San Marcos during my formidable years and really have to tell those interested about what a nice town it is. The best  More

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Reviews for Olney    2 Reviews
Amanda · Olney, IL
Sleepy town slowly awakening
Over 3 years ago

Olney is a small slowly awakening sleepy town in Southern Illinois. It is still small hometown USA with a little more opportunity than Mayberry. We have new businesses,  More

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Bil · Olney, IL
Mellow Little Town
Over 13 years ago

Perfect place to live if you want a quiet place with friendly people and white squirrels. The white squirrels are Olney's claim to  More

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