B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
16,523
16,523 -- advertising agency count for California advertising agencies (2026)
California is home to 16,523 advertising agencies.
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Lighthouse Research Team
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Source verified
Evidence graded
Value
16,523
Unit
Count
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
IBISWorld
Primary
Tier B
https://digitalmarketingsnapshotforghl.com/blog/astro-vs-wordpress-websites-los-angeles-agencies/ ↗
Source Article
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For a Los Angeles marketing agency, an Astro website will almost always beat a WordPress one on the two numbers that decide whether your site earns its keep: Google PageSpeed and Core Web Vitals. Astro ships near-zero JavaScript and serves static-first pages from the edge, so a well-built Astro site…
Original Research
IBISWorld
· Original study ↗
Methodology
IBISWorld industry data
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
California advertising agencies: 16,523 advertising agency count. Source: IBISWorld (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/california-advertising-agencies-count
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<blockquote cite="https://lighthousedata.io/data/california-advertising-agencies-count" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>16,523</strong> -- advertising agency count for California advertising agencies<br><small>Source: IBISWorld (2026) · <a href="https://lighthousedata.io/data/california-advertising-agencies-count" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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