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Seneca, IL

2,450 Population
6.2 square miles 394.9 people per square mile

Census data: ACS 2024 5-year unless noted

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Demographics

35.5 ±9.6 Median age
  • about 80 percent of the figure in the Ottawa, IL Micro Area: 42.6 ±0.2
  • about 90 percent of the figure in Illinois: 39 ±0.1
  • about 90 percent of the figure in United States: 38.9 ±0.1

Economics

$41,006 ±$6,362 Per capita income
  • a little higher than the amount in the Ottawa, IL Micro Area: $38,977 ±$1,066
  • about 90 percent of the amount in Illinois: $46,406 ±$212
  • about 90 percent of the amount in United States: $44,673 ±$122
$86,830 ±$20,382 Median household income
  • about 20 percent higher than the amount in the Ottawa, IL Micro Area: $72,230 ±$1,824
  • a little higher than the amount in Illinois: $83,390 ±$362
  • about 10 percent higher than the amount in United States: $80,734 ±$166

22.2% ±10.7% (543  ±265) Persons below poverty line
  • more than 1.5 times the rate in the Ottawa, IL Micro Area: 13% 18,604 (±1% / ±1,396)
  • nearly double the rate in Illinois: 11.8% 1,464,937 (±0.2% / ±18,161)
  • more than 1.5 times the rate in United States: 12.5% 40,735,660 (±0.1% / ±275,861)

26.2 minutes ±4 (23,440  ±5,682) Mean travel time to work
  • a little higher than the figure in the Ottawa, IL Micro Area: 24.9 1,621,775 (±0.8 / ±59,496)
  • a little less than the figure in Illinois: 27.8 143,793,920 (±0.1 / ±595,293)
  • about the same as the figure in United States: 26.4 3,569,606,700 (±0 / ±5,719,373)

Families

907 ±119 Number of households
  • the Ottawa, IL Micro Area: 61,866 ±693
  • Illinois: 5,036,449 ±8,009
  • United States: 129,227,496 ±209,365
2.7 ±0.4 (2,450  ±168) Persons per household
  • about 20 percent higher than the figure in the Ottawa, IL Micro Area: 2.3 143,611 (±0 / ±81)
  • about 10 percent higher than the figure in Illinois: 2.5 12,405,980
  • about 10 percent higher than the figure in United States: 2.5 326,722,430

7.6% ±6.1% (29  ±24) Women 15-50 who gave birth during past year
  • about 10 percent higher than the rate in the Ottawa, IL Micro Area: 7% † 2,085 (±1% / ±292)
  • about 1.5 times the rate in Illinois: 4.9% 147,208 (±0.1% / ±3,564)
  • about 1.5 times the rate in United States: 5.1% 4,009,203 (±0% / ±20,898)

Housing

968 ±125 Number of housing units
  • the Ottawa, IL Micro Area: 68,563 ±105
  • Illinois: 5,457,452 ±471
  • United States: 143,775,360 ±10,234

$227,500 ±$41,174 Median value of owner-occupied housing units
  • about 1.5 times the amount in the Ottawa, IL Micro Area: $156,400 ±$2,374
  • about 90 percent of the amount in Illinois: $263,300 ±$797
  • about two-thirds of the amount in United States: $332,700 ±$236

3% ±2.1% (73  ±50.4) Moved since previous year
  • about one-third of the rate in the Ottawa, IL Micro Area: 9.4% 13,716 (±0.8% / ±1,166.8)
  • about one-quarter of the rate in Illinois: 11.1% 1,396,426 (±0.1% / ±14,640.6)
  • about one-quarter of the rate in United States: 12.3% 40,747,183 (±0% / ±136,530.8)

Social

93.9% ±7.9% (1,500  ±223.4) High school grad or higher
  • about the same as the rate in the Ottawa, IL Micro Area: 91.8% 96,249 (±1.6% / ±1,705.1)
  • a little higher than the rate in Illinois: 90.5% 7,931,250 (±0.3% / ±22,974.6)
  • a little higher than the rate in United States: 89.6% 206,814,894 (±0.1% / ±283,951.7)
14.9% ±4.5% (238  ±77) Bachelor's degree or higher
  • about two-thirds of the rate in the Ottawa, IL Micro Area: 20.9% 21,848 (±0.8% / ±831.6)
  • about two-fifths of the rate in Illinois: 37.9% 3,318,149 (±0.2% / ±14,295.2)
  • about two-fifths of the rate in United States: 35.7% 82,363,217 (±0.1% / ±182,857.7)

N/A Persons with language other than English spoken at home

2% ±1.9% (50  ±46) Foreign-born population
  • about half the rate in the Ottawa, IL Micro Area: 3.7% 5,431
  • less than a fifth of the rate in Illinois: 14.8% 1,872,449
  • less than a fifth of the rate in United States: 14.1% 47,349,080

11.2% ±6.3% (196  ±113) Population with veteran status
  • about 1.5 times the rate in the Ottawa, IL Micro Area: 7.3% 8,511 (±0.5% / ±578)
  • more than double the rate in Illinois: 4.8% 478,196 (±0.1% / ±4,766)
  • nearly double the rate in United States: 6.2% 16,185,883 (±0% / ±45,251)
196 Total veterans ±113 186 Male ±113 10 Female ±11

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