Costco shoppers may find high-protein staples such as tuna, Greek yogurt, chicken, salmon, eggs, turkey, bars, shakes and almonds—but there is no guaranteed nationwide top 10. Stock, package sizes and prices vary by location, so treat these as useful examples, check your local warehouse and compare the nutrition label on the package you buy.
10 high-protein foods to look for at Costco
This is a practical shopping list, not a tested ranking. The products below differ in serving size, preparation and nutrition information available online; compare them using each package’s serving label rather than assuming that unlike packages are directly comparable.
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Kirkland Signature albacore tuna in water
Costco lists an eight-count pack of 7-ounce cans. The product page gives conflicting figures: its highlights say 42 grams of protein per can, while its nutrition panel says 43 grams per can. That panel also lists 210 calories and 480 milligrams of sodium per can; Costco gives the drained weight as 5.4 ounces. Use the label on your own pack to settle the discrepancy. See Costco’s tuna listing.
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Kirkland Signature organic Greek yogurt
Costco lists a 48-ounce, nonfat, USDA organic product and describes it as an excellent source of protein, but the captured listing does not give a grams-per-serving figure. Check the tub for protein per serving and serving size before comparing it with other foods. See Costco’s yogurt listing.
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Optimum Nutrition Gold Standard Whey Protein, Double Rich Chocolate, 2 LB- 24 g High-Quality Whey Protein per Scoop – 100% of the protein from whey for a fast-absorbing, complete protein source that supports muscle maintenance and growth.
- 5.5 g Naturally-Occurring BCAAs + 11g of naturally occurring EAAs – Delivers essential amino acids including leucine, isoleucine, and valine to support post-workout muscle recovery, muscle strength and muscle building when taken over time with regular resistance training.
- Low Sugar, Low Carb, Low Fat — Ideal for Lean Muscle or Cutting Phases – With just ~1 g sugar, ~3 g carbs per serving, and whey protein isolate as the primary ingredient with further carbs and fat “isolated” out. It’s a high quality choice for athletes focused on lean muscle, weight management, or body-composition goals.
- Instantized & Easy-Mix Formula (Great Mixability) – Designed to dissolve smoothly in water, milk, or smoothies with a spoon, shaker, or blender — perfect for fast post-workout shakes or convenient protein boosts.
- Trusted Brand, Tested Quality & Versatile Use – For 35 years, athletes have trusted Optimum Nutrition to fuel their training. Gold Standard Whey is the trusted choice for gym-goers, athletes, and everyday fitness enthusiasts worldwide — use post-workout or as a protein supplement anytime.
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Kirkland Signature lightly breaded chicken breast fillets
These fully cooked fillets are listed with 22 grams of protein per serving. Costco suggests heating them in an air fryer or oven, making them a heat-and-eat option rather than a raw ingredient. The listing is warehouse-only, so check local availability. See Costco’s chicken-fillets listing.
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Kirkland Signature frozen boneless, skinless chicken breasts
Costco lists a 6.5-pound bag of uncooked, individually frozen chicken breasts. The product contains up to an 8% solution of water and kosher salt. That matters when comparing package weight or sodium with plain chicken; review the current ingredient and nutrition labels. See Costco’s frozen-chicken listing.
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Optimum Nutrition Gold Standard Whey Protein Powder, Vanilla Ice Cream, 2LB- 24 g High-Quality Whey Protein per Scoop – 100% of the protein from whey for a fast-absorbing, complete protein source that supports muscle maintenance and growth.
- 5.5 g Naturally-Occurring BCAAs + 11g of naturally occurring EAAs – Delivers essential amino acids including leucine, isoleucine, and valine to support post-workout muscle recovery, muscle strength and muscle building when taken over time with regular resistance training.
- Low Sugar, Low Carb, Low Fat — Ideal for Lean Muscle or Cutting Phases – With just ~1 g sugar, ~3 g carbs per serving, and whey protein isolate as the primary ingredient with further carbs and fat “isolated” out. It’s a high quality choice for athletes focused on lean muscle, weight management, or body-composition goals.
- Instantized & Easy-Mix Formula (Great Mixability) – Designed to dissolve smoothly in water, milk, or smoothies with a spoon, shaker, or blender — perfect for fast post-workout shakes or convenient protein boosts.
- Trusted Brand, Tested Quality & Versatile Use – For 35 years, athletes have trusted Optimum Nutrition to fuel their training. Gold Standard Whey is the trusted choice for gym-goers, athletes, and everyday fitness enthusiasts worldwide — use post-workout or as a protein supplement anytime.
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Atlantic blackened salmon
This appears in Costco’s Kirkland Signature assortment. The reviewed listing does not provide a protein figure or establish that it is available at your warehouse, so check the package label and local stock before choosing it. Browse Costco’s Kirkland Signature assortment.
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Oven-roasted sliced turkey breast
Costco’s assortment listing includes oven-roasted sliced turkey breast. Package size, nutrition and local availability should be verified on the current listing and label; the reviewed source does not provide those details. Browse Costco’s Kirkland Signature assortment.
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Premier Protein 30g High Protein Powder, 100% Whey, Chocolate, 17 Servings- Rich and smooth, chocolate flavored protein powder that helps you nail your protein goals with supremely decadent taste
- 30g Protein per serving, with all the essential amino acids and 100% of protein from Whey to feed your muscles and curb your hunger
- Guilt free yum: 1g Sugar, 3g Carbs, 150 Calories and Low Fat; No Soy Ingredients, Gluten Free
- Each tub comes with 17 servings and a scoop – just add water for smooth, decadent but easy post-workout recovery
- Mix, Bake, Blend – recreate your favorites smoothie, pancakes, muffins, cookies, donuts, brownies, or protein bars
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Organic medium hard-boiled eggs
Organic medium hard-boiled eggs also appear in Costco’s assortment. They are a ready-to-eat option, but the reviewed listing does not expose package nutrition details. Check the carton for serving size and protein. Browse Costco’s Kirkland Signature assortment.
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Protein bars
Costco’s protein-snack category lists Kirkland Signature protein bar products. Bars can be convenient to carry, but the category listing does not provide one representative bar’s nutrition panel. Compare protein alongside calories, sugar, fiber and serving size on the exact package. Browse Costco’s protein snacks.
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Body Fortress Super Advanced Whey Protein Powder, Chocolate, 3.9 lbs- Featuring 100% Whey.
- Helps Support Your Immune System with Vitamin C & D Plus Zinc.
- Build Lean Muscle & Strength.
- Boost Post-Workout Recovery.
- Instantized for Easy Mixing.
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Ready-to-drink protein shakes
Costco’s category listing includes Premier Protein shakes and other options. Treat them as packaged convenience products, and check the specific product’s nutrition facts and ingredients rather than assuming all shakes have the same profile. Browse Costco’s protein snacks.
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Kirkland Signature whole almonds
Whole almonds appear in Costco’s protein-snack category as a plant-based snack option. Compare protein per labeled serving with calories and portion size; nuts are not a like-for-like substitute for lean meat or dairy when comparing protein density. Browse Costco’s protein snacks.
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Transparent Labs Grass-Fed Whey Protein - 30 Servings, Milk Chocolate- Naturally Flavored Clean Protein Powder: Made from naturally-fed, hormone-free whey, free of artificial sweeteners, food dyes, gluten, and preservatives. Transparent Labs 100% Grass-Fed Whey Protein Isolate is one of the cleanest proteins on the market.
- 28g of Protein Per Serving: Transparent Labs Whey Protein Isolate is sourced from 100% grass-fed, grass finished American dairy cattle. It contains one of the industry’s highest protein-by-weight ratios, and packs 28g of protein per serving with minimal sugar or fat.
- Enhance Recovery, Increase Strength: Transparent Labs 100% Grass-Fed Whey Protein Isolate gives you a highly bioavailable protein that is light on the stomach and goes down easily. This is the perfect protein for those who want to support recovery and promote muscle growth, while promoting overall health and longevity.
- Contains All Nine Essential Amino Acids: Protein is made up of amino acids, which are the building blocks of muscle proteins. Depending on where your protein comes from, it will contain different amounts of the various building blocks. All of our protein powders contain all nine essential amino acids in a balanced ratio to support muscle protein synthesis, so you can trust that our protein powders will help you reach your muscle building and fitness goals.
- Easily Digestible & Rapidly Absorbed: There’s nothing worse than the digestive discomfort often associated with trying to increase your protein intake. Our protein powder is designed with your digestive health in mind. No more bloating, gas, or digestive woes - just pure protein goodness that your body can readily utilize.
How to compare Costco protein foods
- Start with protein per labeled serving. Check both the grams of protein and the serving size. When labels allow, comparing protein per 100 grams can help make different serving sizes easier to assess, but it does not replace considering how much you typically eat.
- Match the food to how you will use it. Tuna, eggs and some shakes or bars can be ready to eat; breaded fillets need reheating; raw frozen chicken needs cooking. Convenience may matter as much as the protein number for a quick meal.
- Account for package size and storage. A large bag or multi-pack can be useful if you have room to store it and will use it. Consider whether the product needs refrigeration or freezer space and how you will portion it.
- Check the rest of the label. Compare calories and sodium where provided, and review ingredients, sugar and fiber for packaged snacks. The information available for the specific Costco examples is not uniform, so use the package in hand.
- Confirm current local stock. Costco’s product and assortment pages do not establish a universal selection. Use your local warehouse’s availability information and verify the current package before making a trip.
Which option is best for your shopping goal?
“Best” depends on the job you want the food to do, not on a universal ranking. The product examples with a stated protein figure in the reviewed listings are tuna and lightly breaded chicken fillets; the tuna page’s conflicting 42- and 43-gram figures make the package label especially important. For a convenient snack, consider bars, shakes, eggs or almonds, checking the exact product label. For meals you will cook, frozen chicken or salmon may suit your plan if the package and preparation work for your household.
Are these foods available at every Costco?
No. Costco’s listings show that selection and availability depend on location, and the lightly breaded chicken fillets are specifically marked warehouse-only. Product formulations, package sizes and prices can also change. Check your local warehouse and the label on the item you purchase; Costco advises customers that label information may vary.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
