The Huntington–Hill method, also known as the Method of Equal Proportions, ensures the smallest percentage difference in the sizes of U.S. Congressional districts among the states by first assigning to each state its Constitutionally mandated at least one Representative and then ranking the states according to the geometric mean between the current population of their Congressional districts and what it would be with one more Representative, with the next Representative going to the highest-ranked state, and finally repeating the process until the desired number of Congressional seats has been apportioned among the states.

The following data come from the U.S. Census Bureau and were released at 2:57:19.55 EST on Tuesday 22 December 2010; the state receiving the next Representative is highlighted.

The census figures have been revised since their initial release (and if the actual apportionment were based on the revised figures, TX would lose a Representative to NJ), and this simulation also estimates the apportionment if Puerto Rico and the District of Columbia were states, and the number of Representatives were permanently increased by 1; just disregard the last two rows to get the 435-representative estimate.