There has long been a need for a systematic set of instructions for the projection of populations for such subnational areas as states, provinces, districts, or statistical planning areas; and for specific groups of population which may overlap different areas within a country, such as the labor force, various occupation groups, the school age population, literates, or ethnic groups. These guidelines attempt to meet that need. The guidelines are designed to aid development planners by discussing the types of population projections and the ingredients of each to help them decide what the data will permit, and what they should do to produce the numbers required by their work. Sections include the following: (1) General Considerations in Population Projections; (2) Subnational Areas and Population Projection; (3) Measurement and Estimation of Internal Migration; (4) Measurement and Estimation of Natural Population Change; (5) Mechanical Methods for Projecting Subnational Populations; (6) Analytic Methods of Subnational Population Projection; (7) Projecting Urban and Rural Population and Socio-Economic Groups; and (8) Some Methods of Estimation from Incomplete Data. (Author/RH)