A typical 1 container serving of greek yogurt (nonfat) contains 17.3 grams of protein (10.2 g per 100 g), which makes it a very good source of protein. That covers roughly 35% of the 50 g reference Daily Value, so it can anchor a high-protein meal for the day.
About 69% of the calories in greek yogurt (nonfat) come from protein, which makes it extremely 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 81 dairy foods in the database, greek yogurt (nonfat) ranks 7th by protein per serving, and 201st out of all 796 foods on the site. Set against ricotta (whole milk), another dairy food entry in the database, a serving carries about 1.2 g less protein (ricotta (whole milk) has 18.5 g per 1 cup).
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 counted by piece at 170 g. Because pieces vary, the per-100 g figure is the one to use when comparing this against a food measured a different way.
Rich in leucine, the amino acid that most strongly triggers muscle-protein synthesis.
Source: USDA FoodData Central #170894 - "Yogurt, Greek, plain, nonfat (Includes foods for USDA's Food Distribution Program)" (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
Greek yogurt (nonfat) protein FAQ
How much protein is in greek yogurt (nonfat) per 100 g?
Greek yogurt (nonfat) has 10.2 g of protein per 100 g. A typical 1 container serving (170 g) provides 17.3 g.
Is greek yogurt (nonfat) a complete protein?
Yes. Greek yogurt (nonfat) 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 greek yogurt (nonfat) cover?
A 1 container serving of greek yogurt (nonfat) contains 17.3 g of protein, about 35% of the 50 g reference Daily Value.
Is greek yogurt (nonfat) a good source of protein?
Greek yogurt (nonfat) is a very good source of protein, and about 69% of its calories come from protein, which makes it extremely protein-dense. Set against ricotta (whole milk), another dairy food entry in the database, a serving carries about 1.2 g less protein (ricotta (whole milk) has 18.5 g per 1 cup).