The circular economy is a contemporary European and global phenomenon, which is gaining more and more attention, especially in relation to municipal waste, mainly after the adoption of the EU circular packages and the Czech Act No. 541/2020 Coll., on waste. It sets ambitious long-term goals that are legally binding. Municipalities in particular will find it very difficult to meet these targets, as their current circular economy practices are very limited, both in terms of the amount and structure of municipal waste. The submitted paper predicts the amount of registered mixed municipal waste in the years 1996–2020 in a type III municipality in the Czech Republic, closer to the Olomouc Region. The case study can serve as a basis for waste management planning and, at the same time, as a tool for supporting decision-making on how to allocate potential waste production.