Yes, cooked ham is keto. Most brands and types of ham contain few, if any, carbohydrates. For example, a 3-ounce serving of cooked ham might typically contain only 1 gram of carbohydrates, which is less than 1% of the daily recommended intake of carbs for a standard 2,000 calorie diet (which is about 300 grams per day). Remember, the keto diet puts emphasis on high fat, adequate protein and very low carb intake, and in that aspect, cooked ham aligns well.