Legislative districts of Lanao del Norte

Prior to gaining separate representation, areas now under the jurisdiction of Lanao del Norte were represented under the Department of Mindanao and Sulu (1917–1935) and the historical Lanao Province (1935–1961).^{[citation needed]}

The enactment of Republic Act No. 2228 on 22 May 1959 divided the old Lanao Province into Lanao del Norte and Lanao del Sur, and provided them each with a congressional representative.^[1] In accordance with Section 8 of R.A. 2228, the incumbent representative of Lanao Province, Laurentino Badelles, continued to represent both successor provinces until the next general election in 1961.^[1] The chartered city of Iligan, despite being enumerated as part of the territory of neither successor province,^[1] was designated as Lanao del Norte's seat of provincial government and became part of its congressional representation.^{[citation needed]}

Lanao del Norte was represented in the Interim Batasang Pambansa as part of Region XII from 1978 to 1984. The province returned one representative, elected at large, to the Regular Batasang Pambansa in 1984. Iligan, declared a highly urbanized city in 1983, separately elected its own representative in this election.^{[citation needed]}

Under the new Constitution^[2] which was proclaimed on 11 February 1987, Lanao del Norte was once more grouped with Iligan and reapportioned into two congressional districts, which elected their respective members to the restored House of Representatives starting that same year.^{[citation needed]}

The passage of Republic Act No. 9724 on 20 October 2009, segregated the highly urbanized city of Iligan from the first district of Lanao del Norte to form its own congressional district starting in the 2010 elections.^[3] Republic Act No. 9774, enacted on 17 November 2009, further reapportioned Lanao del Norte's districts by transferring the municipalities of Balo-i, Matungao, Pantar and Tagoloan from the second to the first district.^[4] The reconfigured districts elected their representatives beginning in the 2010 elections.

• Municipalities: Bacolod, Balo-i, Baroy, Kauswagan, Kolambugan, Linamon, Maigo, Matungao, Pantar, Tagoloan, Tubod
• Population (2015): 295,473^[5]

• Municipalities: Kapatagan, Lala, Magsaysay, Munai, Nunungan, Pantao Ragat, Poona Piagapo, Salvador, Sapad, Sultan Naga Dimaporo, Tangcal
• Population (2015): 380,922^[5]

• includes the chartered city of Iligan

• excludes the highly urbanized city of Iligan

• Legislative district of Mindanao and Sulu
• Legislative district of Lanao
• Legislative district of Iligan