JSON-LD adoption: 41% of pages (Web Almanac 2024); 62M domains, +37% YoY (Schema App / W3Techs)

Claim: Schema.org adoption is now widespread but uneven:

• 41% of pages carry JSON-LD per HTTP Archive Web Almanac 2024 (up from 34% in 2022)
• RDFa: 66%; Microdata: 26%
• 62 million domains use schema markup, growing 37% annually (Schema App / W3Techs)
• Schema.org currently defines 800+ types
• Most growth is driven by CMS plugin defaults (Yoast, RankMath, AIOSEO) — not hand-coded

Sources: https://almanac.httparchive.org/en/2024/structured-data; xictron.com 2026 update citing Schema App and W3Techs.

Confidence: Industry-consensus.

Adoption-quality caveat: Digital Applied's 5,000-site audit (April 2026) found 71% deploy at least one schema type — but only 22% pass Google's Rich Results Test cleanly. Validity matters more than presence (see Digital Applied 5K-site audit (Apr 2026): only 22% of schema implementations pass Google Rich Results Test (r=+0.34 with AI citation)).