Theydon Bois ( or ) is a large residential village and civil parish in the Epping Forest district of the county of Essex, England. It is located 1.4 miles (2.2 km) south of Epping, 0.85 miles (1.3 km) northeast of Loughton and 6 miles (9.6 km) south of Harlow. The population is 3,993.