Where Local Decisions Happen: Illinois on Nextdoor — 3.20M Adults at 32.5% Coverage, With a 55+ Majority
Audience capacity (18+).
Planning estimates indicate 3.20 million adult Nextdoor users in Illinois. That equals about 32.5% of the adult population (9.85M).
Illinois’s Nextdoor Audience Coverage (Penetration)
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Overall coverage: 32.5% of adults (18+).
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By age: 9.94% (18–24), 18.49% (25–34), 30.74% (35–44), 40.65% (45–54), 42.97% (55+).
Coverage rises steadily with age—clear signal of Nextdoor’s strength among established, home-oriented households.
Age Structure of the Nextdoor Audience in Illinois
Distribution of 3.20M adult users by age:
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18–24: 0.113M (~3.5%)
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25–34: 0.311M (~9.7%)
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35–44: 0.516M (~16.1%)
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45–54: 0.632M (~19.7%)
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55+: 1.631M (~50.9%)
The audience is distinctly older-skewing: ~51% are 55+, while 18–24 is only ~3.5%—the mirror image of many entertainment-led platforms.
Illinois — Age/Gender Nextdoor Audience
Download| Age Group | Population | Male (Nextdoor) | Female (Nextdoor) | Total (Nextdoor) | Penetration |
|---|---|---|---|---|---|
| 18–24 | 1,137,066 | 51,000 | 62,000 | 113,000 | |
| 25–34 | 1,682,224 | 134,000 | 177,000 | 311,000 | |
| 35–44 | 1,678,404 | 215,000 | 301,000 | 516,000 | |
| 45–54 | 1,554,808 | 248,000 | 384,000 | 632,000 | |
| 55+ | 3,795,560 | 631,000 | 1,000,000 | 1,631,000 | |
| Total 18+ | 9,848,062 | 1,279,000 | 1,924,000 | 3,203,000 |
Illinois’s Nextdoor Audience Gender Distribution
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Male — 1.279M (~39.9%)
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Female — 1.924M (~60.1%)
Illinois is female-leaning, aligning well with categories tied to household purchases and community services.
What this means for planning
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Local reach with precision: 3.20M adults statewide with neighborhood/ZIP targeting.
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Home & community categories: High 45–54 and 55+ shares favor services with longer purchase cycles and higher household involvement (home improvement, financial/insurance, healthcare, utilities).
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Footprint alignment: Phase flights by metros or neighborhood clusters to reduce waste and match store/service areas.
Methodology note
These figures are not total registered users or an official count of active accounts. They represent an upper-bound forecast of potential unique reach for a 30-day flight—the maximum expected number of unique users available to advertising over that period. Treat them as the potential unique audience. The platform does not disclose registered account counts by state.