This chapter starts with a definition of the term ‘referendum’. A referendum is a means of involving the public in political decisions via voting on specific issues such as leaving the European Union. The chapter focuses on the use of referendums at the local level. It sets out the key features of a referendum. Who is allowed to vote in referendums? What sort of questions are put to voters? Under want circumstances should a referendum take place on specific issues? What are the risks associated with holding a referendum? The chapter also looks at regulations surrounding referendums in the UK. The theoretical considerations that the chapter examines are the fact that a referendum subject tends to be controversial, the relationship between referendums and direct democracy and the implications of the results.