In this paper we will primarily discuss nonresponse weighting adjustment for demographic surveys used at the Bureau of the Census. Sections II and III discuss various types of nonresponse and adjustment approaches to deal with these different types of nonresponse, respectively. The effect of nonresponse on survey estimates is discussed in Section IV, and the criteria to define noninterview cells are presented in Section V. As an example, the noninterview adjustment methods used for the Survey of Income and Program Participation (SIPP) are presented in Section VI. Section VII presents a discussion on noninterview adjustment research.