Scheduled monuments in Hertfordshire

There are 225 scheduled monuments in the county of Hertfordshire, England. These protected sites date from the Neolithic period and include barrows, ruined abbeys, castles, and Iron Age hill forts. In the United Kingdom, the scheduling of monuments was first initiated to ensure the preservation of "nationally important" archaeological sites or historic buildings. Protection is given to scheduled monuments under the Ancient Monuments and Archaeological Areas Act 1979.