The United States is divided into 435 congressional districts — 8 in Maryland — each with a population of about 710,000 individuals. Each district elects a representative to the House for a two-year term.Representatives are also called congressmen/congresswomen.he United States is divided into 435 congressional districts — 8 in Maryland — each with a population of about 710,000 individuals. Each district elects a representative to the House for a two-year term.