Background: A supportive context is essential for successful implementation processes. Local politicians are delivery system actors who might both enable and hinder the implementation of health and social policies. Aims and objectives: The study examines the relationship between perceived prerequisites and the type of actions taken by local political committees to support the implementation of evidence-based practice in social services. Methods: A cross-sectional web survey targeting the chair and vice-chair of committees responsible for social services in Sweden (n=181). The data was analysed with regression analysis, cluster analysis and ANOVA. Findings: Three clusters of action were identified (passive, neutral and active), capturing the reported actions taken by the committees to support implementation of EBP. The committees' perceived prerequisites (capability, motivation, and opportunity) were highest in the active cluster and lowest in the passive cluster. The clusters also differed regarding chair/vice-chair educational level, and type of municipality in which the chair/vice-chair were active. Discussions and conclusion: The variation in reported actions among the committees to support the implementation of EBP implies that some social service organisations might lack the contextual support they need for implementing EBP. The prerequisites for the committees might need to be strengthened with regard to capability, motivation and opportunity. This study is an indication of the relationship between committees' prerequisites and their actions in the implementation of EBP, but further research is needed.