A functional region is characterised by a high frequency of intra-regional interaction. The text analyses how functional regions can be identified by using labour market data. Three approaches are applied in this task, named the local labour market, commuting zone, and accessibility approach, respectively. The text includes an application using the Fyrstad region. The situation is also studied at two points in time. The outcomes using the different approaches are compared, and the results combined have a richer flavour.