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2025 Compare Cities People:
Marseilles, IL vs Seneca, IL

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Highlights
- Seneca is 0% more densely populated than Marseilles.
- People are 8.3% less likely to be married in Seneca.
- The Median Age is 9.5 years younger in Seneca.
 Marseilles, ILSeneca, ILUnited States
 Population  Unlock2,648329,725,481
 Female Population51.2%  Unlock50.5%
 Male Population48.8%  Unlock49.5%
 Median Age  Unlock32.838.4
 space3
 Population - 20105,094  Unlock309,327,143
 Population - 2000  Unlock2,053285,036,114
 Population - 19904,811  Unlock251,960,433
 Pop. 2000 to Now  Unlock8.0%15.6%
 Pop. 1990 to Now-0.7%  Unlock30.8%
 space4
 Population Density  Unlock402.093.4
 Land Area9.1  Unlock3,531,905.4
 Water Area  Unlock0.4264,836.8
 space
 Est. Total Population By Age
 Marseilles, ILSeneca, ILUnited States
 Age 0 to 46.6%  Unlock5.9%
 Age 5 to 9  Unlock7.1%6.1%
 Age 10 to 1410.1%  Unlock6.6%
 Age 15 to 17  Unlock4.4%3.9%
 Age 18 to 201.1%  Unlock4.0%
 Age 21 to 24  Unlock5.2%5.2%
 Age 25 to 3411.5%  Unlock13.8%
 Age 35 to 44  Unlock7.4%12.9%
 Age 45 to 5415.1%  Unlock12.6%
 Age 55 to 59  Unlock7.3%6.7%
 Age 60 to 645.7%  Unlock6.3%
 Age 65 to 74  Unlock6.6%9.6%
 Age 75 to 847.1%  Unlock4.5%
 Age 85 and over  Unlock1.3%1.9%
 space1
 Race
 Marseilles, ILSeneca, ILUnited States
 White90.4%  Unlock59.4%
 Black  Unlock1.4%12.2%
 Asian2.7%  Unlock5.6%
 Native American  Unlock0.0%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races1.5%  Unlock3.2%
 Hispanic  Unlock8.0%18.4%
 space2
 Marriage & Family
 Marseilles, ILSeneca, ILUnited States
 Married Population55.4%  Unlock49.8%
     Currently Married  Unlock47.8%48.0%
 Married but Separated0.0%  Unlock1.8%
 Single Population  Unlock49.2%50.2%
 Never Married19.8%  Unlock33.8%
 Divorced  Unlock15.6%10.8%
 Widowed8.4%  Unlock5.6%
 space5
 Household Size  Unlock2.742.60
 Households1,802  Unlock124,010,992
 Family Households  Unlock75280,755,759
     Married couple, w/children27.4%  Unlock30.5%
     Married couple, no children  Unlock40.3%42.9%
 Non Family Households614  Unlock43,255,233
     Single householder, w/children  Unlock26.1%15.8%
     Single householder, no children5.7%  Unlock10.8%
Voting
Reviews for Marseilles    1 Reviews
Jacqui · Marseilles, IL
Low Crime, But Drug Issues
Over 18 years ago

Marseilles is a good small town to live in. There is little crime, but not much for the kids to do out here. Because of that, I am sad to say that heroin is a problem  More

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Reviews for Seneca    0 Reviews

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Learn More About Marseilles, Illinois
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Learn More About Seneca, Illinois
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