Sonoma County
Location: California, United States
Legal name: Sonoma County appellation of origin
Regulatory body: TTB
Official designation: 27 CFR §4.25 county appellation of origin; not a Part 9 AVA
Sonoma County is modeled here as the appellation/legal-origin layer for the existing EncyclopediaOfWine region row. It identifies the protected label name associated with California, while the original region row remains available as legacy geographic context until downstream links are fully migrated. Sonoma County is not listed as a 27 CFR Part 9 AVA; this row records it as a county appellation of origin because the legacy database row was grouped with AVAs. Commonly associated grapes include Cabernet Sauvignon, Merlot, Pinot Noir, Chardonnay, Zinfandel, Sauvignon Blanc, Syrah. AVA status in the United States is origin-based rather than grape-prescriptive: it protects a delimited place-name and does not require one authorized grape list or a European-style production recipe.
Permitted Grapes
No AVA-specific grape restrictions. Commonly associated grapes: Cabernet Sauvignon, Merlot, Pinot Noir, Chardonnay, Zinfandel, Sauvignon Blanc, Syrah.
Notable Rules
County appellation label use is governed by 27 CFR §4.25. This row exists to migrate the legacy geographic record into the legal-origin layer, but Sonoma County should not be described as a Part 9 AVA.
Recent Vintages
Recent Sonoma County vintages have generally tracked the broader North Coast pattern: drought and heat pressure in several years, uneven smoke concerns in 2020, and a more forgiving 2023 after a wet winter and moderate growing season. Cooler, coastal-influenced districts often had more natural freshness in warm years, while warmer inland areas could show riper, more concentrated profiles. Because smoke exposure and harvest timing varied by site, 2020 should be treated as producer- and vineyard-specific rather than as a simple region-wide verdict.
A general read of growing-season and harvest character — not a rating.
Also Known As
Sonoma County, Sonoma County appellation of origin
Sources & References
- eCFR / 27 CFR §4.25 county appellation of origin; not a Part 9 AVA — United States appellation and AVA framework; public regulatory reference.
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REFERENCE NOTE
This entry is written as an educational overview and may synthesize public regulatory, historical, and editorial sources. It is not an official regulatory record.
Editorial text, descriptions, and vintage commentary © 2026 Encyclopedia of Wine — The Wine Atlas Library. All rights reserved. May not be reproduced without permission.