Walleye is a lean, high-protein fish that delivers solid nutrition with relatively few calories. A single cooked fillet (about 124 grams) contains 148 calories, over 30 grams of protein, and less than 2 grams of fat. For people who catch their own or buy it fresh from the Great Lakes region, it’s one of the healthier proteins you can put on your plate.
Protein and Calorie Profile
Walleye stands out for its protein density. That 30 grams of protein per fillet puts it on par with a chicken breast, but with significantly less fat. At under 2 grams of total fat per serving, walleye is one of the leanest fish available. This makes it especially useful if you’re trying to hit a high protein intake without adding excess calories, whether for weight management or muscle recovery.
The mild, slightly sweet flavor also makes walleye one of the more approachable fish for people who don’t love “fishy” tasting seafood. It takes well to baking, pan-searing, or grilling without needing heavy sauces to mask the taste.
Omega-3 Content
Walleye provides a moderate amount of omega-3 fatty acids, the type linked to heart health, reduced inflammation, and brain function. A 4-ounce cooked portion delivers roughly 500 to 1,000 milligrams of omega-3s. Research on Great Lakes walleye found about 49 milligrams of EPA and 174 milligrams of DHA per 100 grams of fish, with DHA being the form most important for brain and cardiovascular health.
To put that in perspective, walleye falls in the middle of the pack among popular fish. Atlantic and Chinook salmon top the chart at over 1,000 milligrams per serving. Walleye lands in the same range as pink and sockeye salmon. Tilapia, by comparison, provides less than 250 milligrams per serving. So while walleye won’t match the omega-3 punch of a fatty salmon fillet, it delivers meaningfully more than many of the mild white fish people tend to reach for.
Mercury Levels in Walleye
Mercury is the main nutritional concern with walleye. As a predatory freshwater fish, walleye accumulates mercury from smaller fish it eats over its lifetime. Larger, older walleye carry more mercury than younger, smaller ones.
How much mercury a walleye contains depends heavily on where it was caught. A U.S. Geological Survey study found that walleye in lakes invaded by zebra mussels had mercury concentrations 72% higher than walleye from uninvaded lakes. In those invaded lakes, 77% of average-sized walleye (about 16.5 inches) exceeded 0.22 parts per million, a threshold that triggers more restrictive consumption advisories for pregnant women and young children. In uninvaded lakes, that rate dropped to 35%.
This variability means the lake matters as much as the fish itself. If you’re eating walleye caught by friends or family, check your state’s fish consumption advisory for the specific body of water. These advisories are published by state environmental or health agencies and are usually searchable online by lake name.
How Much Walleye Is Safe to Eat
The FDA groups fish into three tiers based on mercury: “Best Choices” (2 to 3 servings per week), “Good Choices” (1 serving per week), and “Choices to Avoid.” Walleye typically falls into the “Good Choices” category for pregnant or breastfeeding women, meaning one 4-ounce serving per week with no other fish that week.
For children, the FDA recommends 2 servings of fish per week from the “Best Choices” list, with portion sizes scaled to age: about 1 ounce for ages 1 to 3, 2 ounces for ages 4 to 7, 3 ounces for ages 8 to 10, and 4 ounces for children 11 and older. If you’re serving kids walleye specifically, keeping it to once a week and choosing smaller portions is a reasonable approach.
For locally caught walleye where no advisory exists, the FDA recommends limiting adults to no more than 6 ounces per week, children under six to 1 to 2 ounces, and children ages six to twelve to 2 to 3 ounces. These are conservative guidelines designed primarily to protect developing nervous systems, which are more vulnerable to mercury.
For the general adult population not in a sensitive category, walleye eaten once or twice a week fits comfortably within a healthy diet. The benefits of the protein and omega-3s outweigh the mercury risk for most people at that frequency.
How Walleye Compares to Other Fish
Choosing between walleye and other common fish comes down to what you’re optimizing for.
- Walleye vs. salmon: Salmon, particularly Atlantic or Chinook varieties, delivers more omega-3s per serving (over 1,000 mg vs. walleye’s 500 to 1,000 mg). Salmon is also fattier overall. If your priority is omega-3 intake and you don’t mind a richer, oilier fish, salmon wins on that front. Walleye is leaner and has a milder flavor, which makes it a better fit for people who want high protein without the fat.
- Walleye vs. tilapia: Both are mild-flavored white fish, but walleye has a significant nutritional edge. Tilapia provides less than 250 mg of omega-3s per serving compared to walleye’s 500 to 1,000 mg. Tilapia is widely farmed and inexpensive, but if you have access to walleye, it’s the more nutrient-dense option.
- Walleye vs. cod or pollock: These are similarly lean white fish. Walleye holds its own on protein and generally offers comparable or slightly higher omega-3 content. Cod and pollock tend to have lower mercury levels, making them a better choice for people who eat fish frequently or are in a sensitive population.
Vitamins and Minerals
Beyond the macronutrients, walleye provides several micronutrients worth noting. It’s a good source of B vitamins, particularly B12 and niacin, both of which play roles in energy metabolism and nervous system function. It also supplies phosphorus, which supports bone health, and selenium, a mineral that acts as an antioxidant and supports thyroid function. These aren’t unique to walleye (most fish deliver a similar micronutrient profile), but they add to the overall case for including it in your diet regularly.