of Nagy Wines, Santa Maria Valley-Santa Barbara County.
- La Sirena
- La Transmission Femmes en Champagne
- Lady of the Sunshine
- Lagier Meredith
- Laird Family Estate
- Lambert Bridge Winery
- Lamborn Family Vineyards Co.
- LaMontagne Winery
- LangeTwins Family Winery and Vineyards
- Larkmead Vineyards
- LaRue Wines
- Laura Michael Wines
- Lawer Estates
- Lazy Creek Vineyards
- Lepiane
- Les Fa'Bulleuses de Champagne
- Levendi Winery
- LEVY & McCLELLAND
- Lewelling Vineyards
- Lime Rock Wines
- Lincourt Vineyards
- Lindstrom Wines
- Lions Peak Vineyards & Winery
- LJ Crafted Wines
- Lobo Wines
- Long Meadow Ranch Winery
- Loubud Wines
- Lucas & Lewellen Vineyards
- Lucas Winery
- Lumen Wines
- Luna Hart Wines
- Lyeth Estate
- Maboroshi Vineyard
- MacRostie Winery and Vineyards
- Maggy Hawk
- Mahogany Mountain Vineyard & Winery
- Maison Perrier-Jouët
- Marcassin Vineyard
- March Wines
- Margins Wine
- Marimar Estate Vineyards & Winery
- Marketta Winery
- Markham Vineyards
- Martha Stoumen Wines
- Martin Ranch Winery
- Martin Ray Vineyards & Winery
- Martinelli Winery
- Mas Doix
- Matanzas Creek Winery
- Materra-Cunat Family Wines
- Matrix Winery
- Mauritson Family Winery
- Medlock Ames Winery
- Merisi
- Merry Edwards Winery
- Meteor Vineyard
- Meyer Family Cellars
- Michael Pozzan Wines
- Migration
- Milano Family Winery
- Millésimé Cellars
- Miner Family Winery
- Mojave Wines
- Monowai Estate
- Monument Mountain Vineyards
- Mumm Napa
- Murganheira
- Mutt Lynch Winery
- Nagy Wines
- Naked Wines
- Napa Wine Co.
- Neely
- New Clairvaux Vineyard
- Nichelini Winery
- Nicolette Christopher
- Nielson Wines
- Niner Wine Estates
- Noble Oaks Vineyard & Winery
- Nostalgia Wines
- Notre Vin
- Oak Farms Vineyards
- Oak Ridge Winery
- Oakville East Wine Co.
- Oakville Ranch
- Oakwild Ranch Toboni Vineyards
- Oddero (Barolo)
- ONEHOPE
- Onesta
- Onward Wines
- Ottavino Wines
- Pacific Star Winery
- Pahlmeyer Winery
- Paint Horse Winery
- Palmaz Vineyards
- Paoletti Estates Winery
- Paradigm Winery
- Parés Baltà
- Parés Baltà
- Passaggio Wines
- Passalacqua Winery
- Peake Ranch Vineyard
- Peay Vineyards
- Pedroncelli Winery
- Peju Province Winery
- Pfendler
- Philip Togni Vineyard
- Pianetta Winery
- Piazza Family Wines
- Pilcrow Wine
- Piña Napa Valley
- Pine Ridge Vineyards
- Plata Wine Partners
- Poças Júnior
- POE Wines
- Portfolio Limited Edition
- Punset (Barbaresco)
Name starts with A-F
Name starts with G-K
Name starts with L-P
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