The Neighborhood Graph: California’s Nextdoor Audience, by the Numbers
What is Nextdoor (and why it matters for advertisers).
Nextdoor is a hyper-local, neighborhood social network where people use real names, verify addresses, and discuss practical, close-to-home topics—home services, safety updates, schools, HOA matters, lost & found, and local commerce. Targeting is built around neighborhoods/ZIPs, which makes the platform especially relevant for brands with local or regional footprints and for categories like home improvement, utilities, financial services, healthcare, retail, and civic outreach.
Audience capacity (18+).
Based on planning estimates, the adult Nextdoor audience in California is 8.40 million users. That’s about 27.5% of the state’s adult population (30.53M).
California’s Nextdoor Audience Coverage (Penetration)
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Overall coverage: 27.5% of adults (18+).
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By age: coverage rises with age—11.35% (18–24), 18.01% (25–34), 28.09% (35–44), 33.90% (45–54), 34.57% (55+).
This pattern underscores Nextdoor’s strength with established, household-oriented audiences and decision makers for the home.
Age Structure of the Nextdoor Audience in California
Distribution of 8.40M adult users by age:
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18–24: 0.404M (4.81%)
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25–34: 1.021M (12.15%)
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35–44: 1.534M (18.26%)
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45–54: 1.643M (19.55%)
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55+: 3.800M (45.23%)
The audience is distinctly older-skewing: nearly half (45%) are 55+, while 18–24 account for under 5%. This is the mirror image of many entertainment-led platforms and a key reason Nextdoor is attractive for categories tied to home ownership and community life.
California — Age/Gender Nextdoor Audience
Download| Age Group | Population | Male (Nextdoor) | Female (Nextdoor) | Total (Nextdoor) | Penetration |
|---|---|---|---|---|---|
| 18–24 | 3,558,215 | 165,000 | 239,000 | 404,000 | |
| 25–34 | 5,670,629 | 408,000 | 613,000 | 1,021,000 | |
| 35–44 | 5,460,310 | 624,000 | 910,000 | 1,534,000 | |
| 45–54 | 4,846,002 | 643,000 | 1,000,000 | 1,643,000 | |
| 55+ | 10,992,708 | 1,500,000 | 2,300,000 | 3,800,000 | |
| Total 18+ | 30,527,864 | 3,340,000 | 5,062,000 | 8,402,000 |
California’s Nextdoor Audience Gender Distribution
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Male — 3.34M (39.8%)
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Female — 5.06M (60.2%)
California’s audience is female-leaning, which can be advantageous for household purchase categories and community-centric messaging.
What this means for planning
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Local reach at scale: 8.4M adults statewide with strong neighborhood granularity.
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Home & community categories: High 45+ and 55+ concentration favors services with longer purchase cycles and higher household involvement (home services, financial, insurance, healthcare, utilities).
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ZIP/neighborhood targeting: Ideal for tightening waste, sequencing flighting by metro or neighborhood clusters, and pairing with retail footprints.
Methodology note
The figures shown 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 (i.e., the maximum expected number of unique users available to advertising over that period). These values can be treated as the potential unique audience. The platform does not disclose the actual number of registered accounts by state.