A typical 1 cup serving of hash browns contains 4.7 grams of protein (3 g per 100 g), which makes it a moderate source of protein. That covers roughly 9% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Only about 5% of the calories in hash browns come from protein, so it is more of an energy food than a protein food. It is worth eating for other reasons; the protein it adds to a day is incidental.
Among the 105 vegetables in the database, hash browns ranks 13th by protein per serving, and 507th out of all 796 foods on the site. Set against canned asparagus, another vegetable entry in the database, a serving carries about 0.5 g less protein (canned asparagus has 5.2 g per 1 cup).
It is an incomplete protein on its own; pairing it with other plant foods across the day covers the full range of essential amino acids. The serving above is measured by volume at 156 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #170036 - "Potatoes, hash brown, home-prepared" (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
Hash browns protein FAQ
How much protein is in hash browns per 100 g?
Hash browns has 3 g of protein per 100 g. A typical 1 cup serving (156 g) provides 4.7 g.
Is hash browns a complete protein?
No. Hash browns is an incomplete protein on its own; pairing it with other protein sources across the day covers the full range of essential amino acids.
How much of the Daily Value does a serving of hash browns cover?
A 1 cup serving of hash browns contains 4.7 g of protein, about 9% of the 50 g reference Daily Value.
Is hash browns a good source of protein?
Hash browns is a moderate source of protein, and about 5% of its calories come from protein, which makes it more of an energy food than a protein food. Set against canned asparagus, another vegetable entry in the database, a serving carries about 0.5 g less protein (canned asparagus has 5.2 g per 1 cup).