Lagos Island (Ìsàlẹ̀ Èkó) is the principal and central local government area (LGA) in Lagos, it was the capital of Lagos State until 1957.It is part of the Lagos Division.As of the preliminary 2006 Nigerian census, the LGA had a population of 209,437 in an area of 8.7 km2. The LGA only covers the western half of Lagos Island; the eastern half is simply referred to as Lagos Island East LCDA.

Historically, Lagos Island (Isale Eko) was home to the Brazilian Quarter of Lagos where the majority of the slave trade returnees from Brazil stayed.Many families lived on Broad Street in the Marina.

The poor eastern side of the island contains the main markets and the poor housing. The island is extremely crowded and congested with people and tribes. And government attempts have been made to build new roads out over the lagoon in order to improve traffic flows. It is the part of Lagos where the Oba (king) of Lagos resides.It is also believed that the Eyo festival can only be held in this part of Lagos.