RHODES T. (1969) Computer models in sub-regional planning, Reg. Studies 3, 331-336. The application of systems analysis techniques to urban research and their exploitation through the use of larger, faster computers is likely to transform traditional approaches to land-use forecasting. There is no shortage of conceptual models for use in sub-regional planning: however, there are relatively few operational models available to practising planners, mainly because of the elaborate data requirements of most conceptual systems. Data availability has therefore been an important criterion in the design of two operational computer models for use in th preparation of a Structure Plan for South Hampshire--a macro model of regional population growth and a micro model for activities allocation within the region. The main body of the paper describes in some detail the design, output and data requirements of these models. Although of use initially in plan preparation, both models are seen as the core of a management information system for early application in plan monitoring and review. Computer models Land-use planning Structure plan Demographic forecasting South Hampshire Systems Activities allocation. © 1969 Taylor & Francis Group, LLC. All rights reserved.