To-Kalon Vineyard, Robert Mondavi Winery.
|Type||American Viticultural Area|
|Part of||Napa Valley AVA|
|Other regions in Napa Valley AVA||Atlas Peak AVA, Calistoga AVA, Chiles Valley AVA, Diamond Mountain District AVA, Howell Mountain AVA, Los Carneros AVA, Mt. Veeder AVA, Coombsville AVA, Oak Knoll District of Napa Valley AVA, Rutherford AVA, Spring Mountain District AVA, St. Helena AVA, Stags Leap District AVA, Wild Horse Valley AVA, Yountville AVA|
|Soil conditions||well-drained gravel|
|Total area||5,700 acres (23 km2)|
|Size of planted vineyards||5,000 acres (20 km2)|
|Grapes produced||Cabernet Sauvignon, Merlot, Chardonnay|
The Oakville AVA is an American Viticultural Area located within Napa Valley AVA and centered around the town of Oakville, California. The appellation extends over a flat expanse of well drained gravel soil between the Vaca and Mayacamas Mountains. Oakville AVA is known for its success with Bordeaux varietals, which have produced wines of rich texture, firm tannins, and notes of mint and herbs.
Geography and climate 
The soil of the Oakville AVA is the result of sedimentary deposits from the hills that form Napa Valley. The soil is gravelly and sandy, with exceptionally good drainage. The portion of the AVA between State Route 29 and the Silverado Trail is a mix of clay and well-drained sandy loam. Oakville AVA has a warm climate well-suited to wine grape production. Wind and fog arriving from San Pablo Bay can affect the morning and evening hours, but their effects are limited by the intervening Yountville Mounts. 
H. W. Crabb planted the first vineyard here in 1868, on 240 acres (97 ha) of land close to the Napa River that he named To Kalon, Greek for "most beautiful". By 1877, Crabb had planted 130 acres (53 ha) and was producing 50,000 gallons (189,250 liters) of wine per year. By 1880, his vineyard had increased to 430 acres (174 ha). The historical To Kalon Vineyard, part of which is owned by the Robert Mondavi Winery, and part of which is owned by Andy Beckstoffer, is still producing grapes today.
In 1903, the United States Department of Agriculture established an experimental vineyard station in Oakville. Known as "Oakville Station", the vineyard is operated by the University of California at Davis. Oakville AVA was officially declared a sub-appellation of Napa Valley in 1993.
There are over 50 wineries  located within, or source their grapes from vineyards in, the Oakville AVA. Many are small, boutique wineries (like Harlan Estate, Screaming Eagle and Spoto Wines) with limited production.
- Appellation America (2007). "Oakville (AVA): Appellation Description". Retrieved Oct. 29, 2007.
- Calwineries (2007). "The World Famous Oakville AVA Bench". Oakville Terrain. Retrieved Oct. 29, 2007.
- Calwineries (2007). "The Effect of Climate on Oakville Cabernet Sauvignon Production". Oakville Climate. Retrieved Oct. 29, 2007.
- Calwineries (2007). "Oakville Wineries". Retrieved Oct. 29, 2007.