The population of Lower Dir District is 797,852.
The population of Upper Dir District is 575,858.
The area of Lower Dir District is 1,582 square kilometers.
The population density of Upper Dir District is 194 people per square kilometer.
Congressional districts are based only on population, not on area.
population levels determine number of districts
US congressional districts
mandla
population
120
As a result of the census, the congressional districts are reapportioned because of the population shift. States with increased population get more districts. State with lower populations lose them. State legislatures then have to redraw the district boundaries.
electoral districts that vary greatly in population
Population.