This study was undertaken with the following objectives: 1) identifying feed deficit regions in the United States, 2) determining the value of field peas as a ration ingredient in swine diets, and 3) identifying the most valuable nutritional components of peas for this use. The results of the study suggest that peas are an attractive alternative as a feed ingredient in hog diets, especially in feed deficit regions. Peas can be part of the least-cost diet replacing corn, barley, and soybean meal. Except at high prices or under low-cost periods for alternative feedstuffs, peas can constitute up to 39 percent of the diet for pigs in the 50 to 80 pound weight category. For hogs 80 to 140 pounds, peas account for up to 52 percent of the diet if prices are low enough. Peas can constitute 36 to 42 percent of the diet for hogs in this class. It is possible for peas to account for 63 percent of a least-cost diet for hogs 140 to 190 pounds, but this would require lower than average prices received in recent years in North Dakota. With reasonable prices, though, peas could account for up to 54 percent of the least-cost diet for hogs in this phase. With very low prices, it is possible for the least-cost diet for 190 to 260 pound hogs to consist of 71 percent peas. Even with this high inclusion rate, methionine is not added because the larger hogs have lower requirements for amino acids.