After 1889, the state was redistricted into 28 districts.

It was further redistricted into six districts by the 1986 Constitutional Commission.

Bukidnon was redistricted into four districts after the candidacies were submitted.

In 1986, it was redistricted into two legislative districts until 2013.

Starting in the 49th Congress, however, the state was redistricted into 10 districts.

The second district of Quezon City was redistricted into three districts.

Cotabato was redistricted into three districts from two.

In 1885, Virginia redistricted its seats into ten geographic districts, thereby eliminating the at-large seat.

Pangasinan was divided into five legislative districts from 1907 to 1972, it was redistricted into six legislative districts in 1986.

Starting in 1875, however, the state was redistricted into six districts.