The location with a high level of accessibility and affordability has a high development of built-up land, which in turn causes slum settlements. There are some biophysical factors, which can cause slum settlements, including road networks and city service centres. Pidie District is one of the districts in Aceh Province which has a slum prevalence of more than 50 hectares, where mostly are located in the District of Sigli City. For that reason, this current study aimed to identify the growth patterns of slum settlements in the Sigli City between 2008 and 2018 based on biophysical aspects. The approach used was spatial-based quantitative, where data on growth patterns of slum settlements were processed using ArcGis 10.6 software. Driving factors included were distance to roads, distance to river, distance to coastline, and distance to city service centre. The results showed that the change in land use into settlements was 101.33 Ha, of which 51.41 Ha were slum settlements. From this number, 26.84 Ha of slum settlements grew adjacent to the road, 14.66 Ha adjacent to the river, 5.49 Ha adjacent to the coastline, and 26.84 Ha adjacent to the city service centre.