Round-tower churches are a type of church found mainly in England, mostly in East Anglia; of about 185 surviving examples in the country, 124 are in Norfolk, 38 in Suffolk, six in Essex, three in Sussex and two each in Cambridgeshire and Berkshire. There is evidence of about 20 round-tower churches in Germany, of similar design and construction to those in East Anglia. Countries with at least one round-tower church include Andorra, the Czech Republic, Denmark, France, Italy, Sweden, Norway, Poland and South Africa.

A round church is a church with a completely circular plan, thus a rotunda in architectural terms.