South East Essex will be a unitary authority area in Essex, England. Scheduled to be created in April 2028 as part of an ongoing local government reorganisation, it will be formed from the existing districts of Castle Point, Rochford and Southend-on-Sea. The first councillors to South East Essex Council will be elected at the 2027 South East Essex Council election in May 2027. The largest settlement in the district is the city of Southend-on-Sea.