Below is a list of red grape varietals and many of the regions they can be found:
Agiorgitiko: Greece
Barbera: Italy, California
Blaufrankisch: Austria
Cabernet Franc: Bordeaux, Canada, Loire Valley (France)
Cabernet Sauvignon: Argentina, Australia, Bordeaux (France), California, Canada, Chile, Hungary, South Africa, Spain, Washington
Carinena: Spain
Carmenere: Chile
Cinsault: Rhone Valley (France)
Concord: United States
Gamay: Burgandy (France)
Garnacha/Grenache: Spain/France
Kadarka: Hungary
Kekfrankos: Hungary
Malbec: Argentina
Merlot: Argentina, Bordeaux (France), California, Canada, Chile, Hungary, Spain, Washington
Monastrell: Spain
Nebbiolo: Piedmont (Italy)
Petite Syrah: California
Pinot Meunier: Champagne (France)
Pinot Noir: Austria, Burgundy (France), California, Canada, Hungary, New Zealand, Oregon
Portugieser: Hungary
Sangiovese: Tuscany (Italy)
St. Laurent: Austria
Syrah/Shiraz: Argentina, California, Canada, Chile, Rhone Valley (France), South Africa, Spain, Washington/Australia
Tempranillo: Spain, Argentina
Xinomavro: Greece
Zinfandel: California