This paper presents the first national estimates of the components of longitudinal household change for the U.S. These estimates pertain to the number of households that continued to exist, that dissolved, and that were newly formed between January 1, 1984 and January 1, 1986. Because this is the first time that such estimates have been developed for the U.S., the paper presents several sets of estimates derived using alternative approaches, and it evaluates the accuracy of these estimates.