Protein in Salmon. Most types of salmon have between 21 and 22 grams of protein per 3-ounce grilled fillet. Chum, chinook, sockeye and Atlantic salmon all fit into this range. If you prefer farm-raised salmon, however, you won’t get quite as much protein. For example, farm-raised Atlantic salmon has fewer than 19 grams of protein in a 3-ounce cooked piece, but you’ll get more than 21.5 grams from the same amount of the wild variety.