the process by which seats in the United States House of Representatives are distributed among the 50 states according to the most recent decennial census mandated by the United States Constitution.

The (originally titled Article the First) a proposed amendment to the United States Constitution that addresses the number of seats in the House of Representatives.

An apportionment paradox is a situation where an apportionment—a rule for dividing discrete objects according to some proportional relationship—produces results that violate notions of common sense or fairness.