A typical 3 oz cooked serving of chicken liver contains 20.8 grams of protein (24.5 g per 100 g), which makes it a very good source of protein. That covers roughly 42% of the 50 g reference Daily Value, so it can anchor a high-protein meal for the day.
About 59% of the calories in chicken liver come from protein, which makes it very protein-dense - close to the practical ceiling for a whole food. Foods in this band are the ones that let you raise your protein intake without raising your calorie intake much at all.
Among the 133 meats in the database, chicken liver ranks 84th by protein per serving, and 133rd out of all 796 foods on the site. Set against quail, another meat entry in the database, a serving carries about 0.5 g less protein (quail has 21.3 g per 3 oz cooked).
It is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own. The serving above is measured by weight at 85 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #171061 - "Chicken, liver, all classes, cooked, simmered" (SR Legacy, published 4/1/2019). Values are the published reference figures for that record, not lab measurements for a specific brand or batch.
Quick answers
Chicken liver protein FAQ
How much protein is in chicken liver per 100 g?
Chicken liver has 24.5 g of protein per 100 g. A typical 3 oz cooked serving (85 g) provides 20.8 g.
Is chicken liver a complete protein?
Yes. Chicken liver is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
How much of the Daily Value does a serving of chicken liver cover?
A 3 oz cooked serving of chicken liver contains 20.8 g of protein, about 42% of the 50 g reference Daily Value.
Is chicken liver a good source of protein?
Chicken liver is a very good source of protein, and about 59% of its calories come from protein, which makes it very protein-dense. Set against quail, another meat entry in the database, a serving carries about 0.5 g less protein (quail has 21.3 g per 3 oz cooked).