Below is a demographic snapshot of Pinterest’s estimated ad audience in the United States (18+), based strictly on the figures you provided.
Pinterest audience in the United States (18+)
| USA | 18-24 | 25-34 | 35-44 | 45-54 | 55+ | Total |
|---|---|---|---|---|---|---|
| Female | 11,200,000 | 13,900,000 | 7,980,000 | 5,440,000 | 8,940,000 | 47,460,000 |
| Male | 3,190,000 | 4,010,000 | 1,810,000 | 1,270,000 | 2,120,000 | 12,400,000 |
| Not Set | 1,010,000 | 1,790,000 | 1,210,000 | 810,000 | 1,340,000 | 6,160,000 |
| Total | 15,400,000 | 19,700,000 | 11,000,000 | 7,520,000 | 12,400,000 | 66,020,000 |
| Population (18+) | 30,475,343 | 45,311,762 | 44,776,584 | 40,521,171 | 101,181,600 | 262,266,460 |
| Share | 50.53% | 43.48% | 24.57% | 18.56% | 12.26% | 25.17% |
Population Source: U.S. Census Bureau — Country Profile (USA)
Table of contents
Overall reach and penetration
Pinterest’s total ad audience in the US (18+) is 66.02M. Compared with an 18+ population base of 262.27M, this corresponds to an overall penetration of 25.17%. In other words, roughly one in four US adults falls within Pinterest’s addressable ad audience in this dataset.
This headline number is meaningful on its own, but it becomes more informative when viewed alongside the age-specific penetration rates. The “Share” row shows that Pinterest’s reach is not evenly distributed across adult age groups, which is a defining characteristic of the platform’s audience profile.
Age structure: clearly younger by penetration
Pinterest’s penetration is highest among younger adults and declines consistently with age. The strongest presence is in 18–24 and 25–34, where Pinterest reaches a large share of each cohort’s adult population. After that, there is a clear break: penetration in 35–44 is almost half of the 25–34 level, and in 55+ it drops to 12.26%.
If we look at the composition inside Pinterest’s total 66.02M audience (instead of penetration), 18–34 accounts for 35.1M, meaning more than half of the entire audience. At the same time, the 55+ segment remains large in absolute terms (12.4M), even though penetration within that age group is low because the 55+ population is very large (101.18M).
Female audience: dominant across all age groups
Gender distribution is strongly skewed. Women account for 47.46M of the 66.02M total audience, or roughly 72%. Men account for 12.4M, or about 19%. This is not driven by a single age group: female audience size exceeds male audience size across every age bucket, indicating that the female skew is a structural feature of this Pinterest audience breakdown.
The table also highlights where the biggest concentrations occur. The single largest cell is Female 25–34 (13.9M). Large female blocks also appear in 18–24 and 55+, reinforcing that women are the primary contributor to total scale at essentially every stage of adulthood, with particularly high weight in the under-35 cohorts.
“Not Set” is a meaningful segment, not noise
The “Not Set” category totals 6.16M, which is about 9% of the overall audience. That is large enough to matter analytically: it is not a rounding artifact and should be treated as a distinct part of the demographic picture.
Because this segment exists across all age groups, the audience cannot be fully explained by a simple Female vs Male split. Any demographic view that focuses only on identified gender categories would omit a non-trivial share of the addressable audience shown here. In short, “Not Set” is a significant third bucket within the gender dimension of this dataset.
Conclusion
Based on the figures provided, Pinterest’s US adult ad audience totals 66.02M, corresponding to 25.17% penetration of the 18+ population. The platform is clearly younger by penetration, with the strongest presence in 18–24 and 25–34 and a steady decline in older cohorts. Gender distribution is heavily female (47.46M (≈72%) vs 12.4M (≈19%)), with a meaningful Not Set segment of 6.16M (≈9%).