Technical Abstract: Field experiments were conducted to quantify functional relationships between giant ragweed density and sweet corn yield and ear traits. A rectangular hyperbolic model was fit to yield loss measured in terms of ear mass, appropriate for the processing industry, and boxes of ears, relevant to the fresh market industry. The initial slope of the hyperbolic yield loss function, which describes the linear portion of yield loss as weed density approaches zero, was 119 for loss of ear mass and 97 for loss of boxes of ears. Coupled with maximum yield losses of 100%, sweet corn has a poorer tolerance to weed interference compared to previous research in field corn. Furthermore, ten of twelve ear traits including green ear mass, husked ear mass, ear length, filled ear length, ear width, number kernels row-1, number of rows, kernel depth, kernel mass, and kernel moisture content, were significantly affected by giant ragweed interference. Future study of sweet corn/weed interactions may need to consider specific variables for yield and ear traits associated with quality, depending on whether the crop is destined for fresh or processed markets.