A typical 1 cup serving of boiled potatoes contains 2.7 grams of protein (1.71 g per 100 g), which makes it only a minor source of protein. That covers roughly 5% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Only about 8% of the calories in boiled potatoes 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, boiled potatoes ranks 37th by protein per serving, and 607th out of all 796 foods on the site. Set against carrot juice, another vegetable entry in the database, a serving carries about 0.5 g more protein (carrot juice has 2.2 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 #170440 - "Potatoes, boiled, cooked without skin, flesh, without salt" (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
Boiled potatoes protein FAQ
How much protein is in boiled potatoes per 100 g?
Boiled potatoes has 1.71 g of protein per 100 g. A typical 1 cup serving (156 g) provides 2.7 g.
Is boiled potatoes a complete protein?
No. Boiled potatoes 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 boiled potatoes cover?
A 1 cup serving of boiled potatoes contains 2.7 g of protein, about 5% of the 50 g reference Daily Value.
Is boiled potatoes a good source of protein?
Boiled potatoes is only a minor source of protein, and about 8% of its calories come from protein, which makes it more of an energy food than a protein food. Set against carrot juice, another vegetable entry in the database, a serving carries about 0.5 g more protein (carrot juice has 2.2 g per 1 cup).