A typical 1 cup cooked serving of parsnips contains 2.1 grams of protein (1.32 g per 100 g), which makes it only a minor source of protein. That covers roughly 4% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Only about 7% of the calories in parsnips 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, parsnips ranks 47th by protein per serving, and 648th out of all 796 foods on the site. Set against summer squash, another vegetable entry in the database, a serving carries about 0.5 g more protein (summer squash has 1.6 g per 1 cup cooked).
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 #170009 - "Parsnips, cooked, boiled, drained, 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
Parsnips protein FAQ
How much protein is in parsnips per 100 g?
Parsnips has 1.32 g of protein per 100 g. A typical 1 cup cooked serving (156 g) provides 2.1 g.
Is parsnips a complete protein?
No. Parsnips 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 parsnips cover?
A 1 cup cooked serving of parsnips contains 2.1 g of protein, about 4% of the 50 g reference Daily Value.
Is parsnips a good source of protein?
Parsnips is only a minor source of protein, and about 7% of its calories come from protein, which makes it more of an energy food than a protein food. Set against summer squash, another vegetable entry in the database, a serving carries about 0.5 g more protein (summer squash has 1.6 g per 1 cup cooked).