Which breed of sheep first originated in the United States and is known for large size with white faces?

The Columbia breed of sheep is recognized as the first sheep breed developed in the United States. It was created in 1930 by crossing the Lincoln and Rambouillet sheep, aiming to produce a breed that would thrive in the diverse climates and varying topographies found in the U.S. One of the distinguishing features of the Columbia breed is its large size and white face, which make it quite recognizable.

Columbias are valued for their dual-purpose capabilities — they provide both wool and meat, combining the desirable traits of their parent breeds. The breed's adaptability to different environments and its excellent fleece quality contribute to its popularity among producers in various states, especially in the western regions.

The other breeds mentioned have distinct origins and purposes; for instance, Dorper sheep originated in South Africa, and Suffolk and Merino sheep have roots in England and Spain, respectively. While these breeds also have important characteristics and uses, they do not fit the specific criteria of being an American-origin breed known for large size and white faces, as the Columbia does.