A typical 1 cup pieces serving of papaya contains 0.7 grams of protein (0.47 g per 100 g), which makes it only a minor source of protein. That covers roughly 1% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Only about 4% of the calories in papaya 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 71 fruits in the database, papaya ranks 57th by protein per serving, and 759th out of all 796 foods on the site. Set against currants, another fruit entry in the database, a serving carries about 0.5 g less protein (currants has 1.2 g per 1/4 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 145 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #169926 - "Papayas, raw" (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
Papaya protein FAQ
How much protein is in papaya per 100 g?
Papaya has 0.47 g of protein per 100 g. A typical 1 cup pieces serving (145 g) provides 0.7 g.
Is papaya a complete protein?
No. Papaya 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 papaya cover?
A 1 cup pieces serving of papaya contains 0.7 g of protein, about 1% of the 50 g reference Daily Value.
Is papaya a good source of protein?
Papaya is only a minor source of protein, and about 4% of its calories come from protein, which makes it more of an energy food than a protein food. Set against currants, another fruit entry in the database, a serving carries about 0.5 g less protein (currants has 1.2 g per 1/4 cup).