Little is known at present about the development, structure, and functions of small towns in the Union of South Africa, and there is a need to fill this gap in our knowledge. A study has been made of Grahamstown, a small South African town. This study is monographic and intensive in character, and heuristic in aim. Ad hoc hypotheses have been formulated on the basis of the findings of the study, and these must be tested by subsequent studies of other small towns. Grahamstown, the subject of the study, was chosen largely for reasons of convenience, and also because of its interesting development. It is suggested that in many ways the town is possibly a typical small town, but at this stage we cannot know if this is so. Only the white population of the town was investigated, as it was necessary to limit research to manageable proportions, and in addition several studies have already been made of the non-white populations of the town. The analysis has been described as socio-ecological, as basically the methodological approach used is an attempt to wed the methods of the urban demographer and the social ecologist. Time and space are used as the two co-ordinates for the analysis, so that both a social historical and an ecological-demographic analysis of the town have been made. The historical analysis of the development and functions of Grahamstown relies heavily on material collected from the early newspapers of the town. Grahamstown, once the most important town in the Eastern Cape Province, known as the ''Emporium" and ''Metropolis" of the Eastern Cape, and the most progressive town in the Colony, is to-day a small static town with, on the whole, relatively restricted influence. This fundamental change in the historical development of the town, hitherto unexplained, is the result of the changes in the socioecological make-up of the region around the town. Founded in 1812 as a strategic outpost on the frontier of the Colony, Grahamstown dominated a wide region; as the gateway to and the supply centre for, the frontier, the town flourished and reigned supreme. From the mid 19th Century onwards the region began to change to a developed one, with the frontier more and more inland. Grahamstown, no longer a strategic outpost in a frontier region, lost its dominant ecological position to Port Elizabeth, the natural supply base for, and gateway to, the new settled region. As one town among many in the new settled region, Grahamstown gradually lost many of its former functions, and began to stagnate. The town is to-day mainly known for its important educational function. This function, a relic from the days of the town's zenith, has saved the town from complete stagnation. The town is what it is to-day largely because of the socio-ecological regional influences which have operated on it since its foundation. To-day Grahamstown is located within the Port Elizabeth metropolitan district. The town is the centre of a wide variety of regional services of an ad hoc type, and the modal region served seems to be that settled by the 1820 Settlers - basically the town is mainly a supply centre for its surrounding rural areas. The demographic structure of the town reveals a static population. Growth of the white population has been practically static since about 1880, and the age structure is that of a stationary population. Particularly noticeable is the under-representation of the young working group in the population, and it is suggested that due to the lack of economic opportunities in the town, the young workers of the town, especially the unmarried males, migrate to larger urban areas to seek employment, and advancement. The sex-ratio of the population shows an excess of females, and this may be due to migration out of an excess of young males, and possibly migration in of older spinsters. Retired persons definitely migrate to the town to settle. The town, a predominantly English speaking one, has practically no industries, and so the population contains a majority of workers engaged in professional, administrative, and commercial activities. This stresses the service and supply functions of the town. The ecological analysis delineated various natural areas and zones in the town. The pattern approximates to patterns revealed by studies of American towns. Although the areas involved were relatively small, ecological differentiation was marked. The spatial distribution of demographic and other social phenomena was studied in detail. The results of the study have allowed several ad hoc hypotheses concerning the development, functions, and structures of small towns in South Africa to be formulated. These may be tested by subsequent studies, and so ultimately knowledge and theories about our small towns may be built up.