A typical 1 piece serving of cornbread contains 4.4 grams of protein (6.7 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 10% of the calories in cornbread 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 111 grains in the database, cornbread ranks 49th by protein per serving, and 518th out of all 796 foods on the site. Set against barley flour, another grain entry in the database, a serving carries about 0.5 g more protein (barley flour has 3.9 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 counted by piece at 65 g. Because pieces vary, the per-100 g figure is the one to use when comparing this against a food measured a different way.
Source: USDA FoodData Central #174910 - "Bread, cornbread, prepared from recipe, made with low fat (2%) milk" (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
Cornbread protein FAQ
How much protein is in cornbread per 100 g?
Cornbread has 6.7 g of protein per 100 g. A typical 1 piece serving (65 g) provides 4.4 g.
Is cornbread a complete protein?
No. Cornbread 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 cornbread cover?
A 1 piece serving of cornbread contains 4.4 g of protein, about 9% of the 50 g reference Daily Value.
Is cornbread a good source of protein?
Cornbread is a moderate source of protein, and about 10% of its calories come from protein, which makes it more of an energy food than a protein food. Set against barley flour, another grain entry in the database, a serving carries about 0.5 g more protein (barley flour has 3.9 g per 1/4 cup).