In times of crisis, people are more prone to endorse conspiracy theories. Conspiracy thinking provides answers about the causes of an event, but it can also have harmful social consequences. Our research tested both the predictor and the consequences of two types of conspiracy beliefs related to the Covid-19 pandemic: (1) general conspiracy beliefs and (2) government-related conspiracy theories. In two studies in Poland (Ntotal = 2726), we found that a perceived lack of individual control predicted both types of conspiracy theories, while a sense of collective control was positively related to general conspiracy beliefs but negatively associated with government-related conspiracy theories. Moreover, general conspiracy theories were related to the acceptance of xenophobic policies and to a less favourable attitude towards outgroups whereas government-related conspiracy theories were not. Additionally, people who believed in conspiratorial governments less frequently indicated that they used prevention methods, such as social distancing and handwashing. Our research demonstrates the importance of considering the content of various conspiracy theories when studying their social effects and potential causes. Knowing which attitudes may be associated with the endorsement of specific conspiracy theories can contribute to counteracting their negative consequences during crises.