As of 2019 Dakshina Kannada Lok Sabha constituency comprises the following Legislative Assembly segments:[1] Before the delimitation (2008), Mangalore Lok Sabha constituency comprised the following Legislative Assembly segments.
[2] Mangalore Lok Sabha Constituency was a part of South Kanara (South) Lok Sabha constituency of Madras State.
That seat came into existence in 1951 when South Kanara District (comprising present Dakshina Kannada District of Karnataka and Kasargod, Kanhangad Taluks of Kerala).
With the implementation of States Reorganisation Act, 1956, it ceased to exist.
South Kanara (South) Lok Sabha constituency comprised the following six Legislative Assembly segments:[3] 1) Panamangalore (Panemangalore), 2) Mangalore, 3) Kasargod, 4) Hosdurg (Kanhangad), 5 and 6) Two Puttur seats After South Kanara District of erstwhile Madras State got merged with Mysore State in 1956, South Kanara (South) Lok Sabha constituency ceased to exist and was replaced by Mangalore Lok Sabha constituency.