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2026 Compare Cities People:
Seneca, IL vs Erie, IL

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Highlights
- Erie is 0% more densely populated than Seneca.
- People are 0.4% more likely to be married in Erie.
- The Median Age is 9.4 years older in Erie.
 Seneca, ILErie, ILUnited States
 Population  Unlock1,747329,725,481
 Female Population51.7%  Unlock50.5%
 Male Population48.3%  Unlock49.5%
 Median Age  Unlock42.238.4
 space3
 Population - 20102,352  Unlock309,327,143
 Population - 2000  Unlock1,589285,036,114
 Population - 19901,878  Unlock251,960,433
 Pop. 2000 to Now  Unlock-6.7%15.6%
 Pop. 1990 to Now18.1%  Unlock30.8%
 space4
 Population Density  Unlock1,210.793.4
 Land Area6.6  Unlock3,531,905.4
 Water Area  Unlock0.0264,836.8
 space
 Est. Total Population By Age
 Seneca, ILErie, ILUnited States
 Age 0 to 49.4%  Unlock5.9%
 Age 5 to 9  Unlock6.4%6.1%
 Age 10 to 146.9%  Unlock6.6%
 Age 15 to 17  Unlock3.8%3.9%
 Age 18 to 203.0%  Unlock4.0%
 Age 21 to 24  Unlock1.8%5.2%
 Age 25 to 3415.8%  Unlock13.8%
 Age 35 to 44  Unlock14.1%12.9%
 Age 45 to 5412.8%  Unlock12.6%
 Age 55 to 59  Unlock7.7%6.7%
 Age 60 to 649.8%  Unlock6.3%
 Age 65 to 74  Unlock8.4%9.6%
 Age 75 to 843.0%  Unlock4.5%
 Age 85 and over  Unlock5.4%1.9%
 space1
 Race
 Seneca, ILErie, ILUnited States
 White88.0%  Unlock59.4%
 Black  Unlock0.0%12.2%
 Asian0.0%  Unlock5.6%
 Native American  Unlock0.7%0.6%
 Hawaiian, Pacific Islander0.0%  Unlock0.2%
 Other  Unlock0.0%0.4%
 Two or More Races2.6%  Unlock3.2%
 Hispanic  Unlock1.5%18.4%
 space2
 Marriage & Family
 Seneca, ILErie, ILUnited States
 Married Population50.8%  Unlock49.8%
     Currently Married  Unlock49.9%48.0%
 Married but Separated3.1%  Unlock1.8%
 Single Population  Unlock49.0%50.2%
 Never Married30.2%  Unlock33.8%
 Divorced  Unlock20.3%10.8%
 Widowed3.4%  Unlock5.6%
 space5
 Household Size  Unlock2.212.60
 Households966  Unlock124,010,992
 Family Households  Unlock52880,755,759
     Married couple, w/children23.4%  Unlock30.5%
     Married couple, no children  Unlock36.7%42.9%
 Non Family Households214  Unlock43,255,233
     Single householder, w/children  Unlock35.6%15.8%
     Single householder, no children10.2%  Unlock10.8%
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Reviews for Seneca    0 Reviews

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Reviews for Erie    2 Reviews
IDaveZ · Erie, IL
Exceptional Small Town Living
Over 16 years ago

Erie is a caring town with a superb school district. A great bedroom community close to the Quad Cities. Very affordable housing. An outstanding community to raise a  More

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Abhd · Chandler, AZ
Looking for Peyton Place?
Over 20 years ago

Erie lives up to its name. If you were not born there you do not exist. I have lived around the world and Erie is by far the unfriendliest, unincorporated, and  More

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Learn More About Seneca, Illinois
Overview
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Learn More About Erie, Illinois
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