How old are the homes in Blue Mound Township (McLean County), IL?

Name: Age of homes in Blue Mound Township (McLean County), IL, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

65.3% (±17.1 points) of the homes in Blue Mound Township (McLean County), IL were built before 1980 (2020–2024 American Community Survey).

33.7% were built before 1940.

9.4% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 65.3% (±17.1 points)
Built before 1940: 33.7%
Built 2010 or later: 9.4%

When the homes in Blue Mound Township (McLean County) were built

Housing units by year structure built, 2020–2024
Year built	Blue Mound Township (McLean County)	McLean County	Illinois	United States
2020 or later	5.4% (±5.8 points)	0.9%	0.7%	2.0%
2010 to 2019	4.0% (±5.9 points)	6.9%	5.0%	9.4%
2000 to 2009	5.0% (±4.4 points)	17.0%	11.2%	13.6%
1990 to 1999	5.0% (±5.4 points)	16.5%	10.5%	12.4%
1980 to 1989	15.3% (±12.8 points)	10.2%	9.2%	12.9%
1970 to 1979	7.9% (±5.8 points)	16.3%	14.2%	14.2%
1960 to 1969	1.0% (±2.2 points)	9.1%	11.5%	9.9%
1950 to 1959	6.9% (±5.4 points)	6.3%	11.9%	9.5%
1940 to 1949	15.8% (±10.0 points)	3.1%	5.6%	4.4%
1939 or earlier	33.7% (±11.1 points)	13.8%	20.2%	11.7%

In Blue Mound Township (McLean County), the share of homes built before 1980 is not measurably different from McLean County (48.6%).

It is not measurably different from Illinois (63.4%).

It is not measurably different from the national figure (49.7%).

In McLean County, Blue Mound Township (McLean County) ranks 28 of 53 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 1624 of 2,751.

Rankings use the estimates alone; where margins of error overlap, neighboring ranks may not truly differ.

Why the age of a home matters: lead-based paint

Federal law treats housing built before 1978 as likely to contain lead-based paint.

Before a lease or sale of most pre-1978 housing, the landlord or seller must disclose any known lead-based paint and hazards and give the tenant or buyer the EPA pamphlet (42 U.S.C. § 4852d; 40 CFR part 745, subpart F; 24 CFR part 35, subpart A).

A contractor paid to renovate, repair or paint a pre-1978 home must be a certified firm, use a certified renovator and follow lead-safe work practices under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E) whenever the job disturbs more than 6 square feet of painted surface in a room or more than 20 square feet outside; window replacement and demolition always count (40 CFR 745.83).

Certification comes from EPA, or from the state where EPA has authorized the state to run the program.

The Census Bureau groups construction by decade, so the share built before 1978 lies between the share built before 1970 (57.4%) and the share built before 1980 (65.3%).

Homes built before 1980 in places near Blue Mound Township (McLean County)

Nearest places with a published estimate, compared with Blue Mound Township (McLean County)
Place	Distance	Homes built before 1980	Compared with this place
Blue Mound Township (McLean County)	—	65.3% (±17.1 points)	—
Cooksville	1.9 mi	68.5% (±20.4 points)	Not measurably different
Ellsworth	5.8 mi	84.6% (±39.6 points)	Not measurably different
Dawson Township	5.8 mi	57.5% (±20.3 points)	Not measurably different
Towanda Township	6.1 mi	27.8% (±6.9 points)	Lower
Martin Township (McLean County)	6.3 mi	85.9% (±12.5 points)	Not measurably different
Lexington Township	6.7 mi	68.1% (±14.0 points)	Not measurably different
Colfax	7.3 mi	85.7% (±12.9 points)	Not measurably different
Arrowsmith	8.3 mi	90.0% (±26.5 points)	Not measurably different

Nearby places with a measurably lower figure: Towanda Township, IL (27.8%).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Homes built before 1980 across McLean County, place by place

Rank	Place	Homes built before 1980
22	Funks Grove Township	74.5% (±61.6 points)
23	Carlock	73.1% (±19.0 points)
24	Gridley Township	69.5% (±12.5 points)
25	Danvers Township	69.1% (±11.7 points)
26	Cooksville	68.5% (±20.4 points)
27	Lexington Township	68.1% (±14.0 points)
28	Blue Mound Township (McLean County)	65.3% (±17.1 points)
29	Gridley	65.1% (±11.0 points)
30	Lexington	64.4% (±11.1 points)
31	Empire Township	64.1% (±12.1 points)
32	White Oak Township	63.7% (±16.0 points)
33	Le Roy	59.6% (±13.0 points)
34	Dry Grove Township	59.1% (±15.0 points)

Showing 13 of 53 places in McLean County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates).

Margins of error are at the 90% confidence level.

What you can do on Seayora in Blue Mound Township (McLean County)

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Questions about Blue Mound Township (McLean County)

How old are most homes in Blue Mound Township (McLean County)?

65.3% of homes in Blue Mound Township (McLean County), IL were built before 1980 (2020–2024 American Community Survey).

Do homes in Blue Mound Township (McLean County) need a lead paint disclosure?

A home built before 1978 does, before it is rented or sold, unless an exemption applies (42 U.S.C. § 4852d); between 57.4% and 65.3% of homes in Blue Mound Township (McLean County) were built before then.

Does a contractor need lead certification to work on older homes in Blue Mound Township (McLean County)?

Yes, when the job disturbs more than 6 square feet of paint in a room or 20 square feet outside, or replaces a window: the firm must be certified and a certified renovator must direct the work under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E).

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Blue Mound township, McLean County, Illinois

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for Blue Mound township, McLean County, Illinois (county subdivision:06743, in state:17 county:113).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The API needs a free key.

Request a Census API key.

DP04_0017PE, DP04_0017PM, DP04_0018PE, DP04_0018PM, DP04_0019PE, DP04_0019PM, DP04_0020PE, DP04_0020PM, DP04_0021PE, DP04_0021PM, DP04_0022PE, DP04_0022PM, DP04_0023PE, DP04_0023PM, DP04_0024PE, DP04_0024PM, DP04_0025PE, DP04_0025PM, DP04_0026PE, DP04_0026PM

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.