The County of SE England is composed of two counties, Kent and Essex. Kent is a county in South East England with a population of 1.8 million people and an area of 3, 400 square miles. Essex is a county in the East of England with a population of 1.4 million people and an area of 1, 400 square miles. Both counties are known for their beautiful countryside, historic towns and villages, and vibrant cities.