Spanish Wineries in Jerez??

The only wineries I have been to in Spain have been in the La Rioja region and Castille. Perhaps you should check with Spanish tourism websites.

I've been to Jerez de la Frontera and there are many Sherry destilleries in and around the town. It's located to far South, though, to produce regular wines, only sweet, port wine like ones (sherry). The regular wines are more in the North, like the famous Rioja valley just South of the Pyrenees mountains.