[3] The district was first formed ahead of the 1943 Philippine legislative election following the ratification of the Second Philippine Republic constitution which called for a unicameral legislature composed of delegates from all provinces and chartered cities in the country.

[4] Iloilo, a chartered city since 1936, elected Fortunato R. Ybiernas to the National Assembly, who was joined by then-mayor Vicente R. Ybiernas as an appointed second delegate.

Instead, it formed part of the multi-member Region VI's at-large district for the interim parliament from 1978 to 1984 and Iloilo's at-large district in the regular parliament from 1984 to 1986.

[3] The city-wide electoral district was only restored in 1987 under a new constitution.

[6] The district is currently represented in the 19th Congress by Julienne L. Baronda of the Lakas–CMD.