town and capital of Lagos state, 10.5 miles (17 km) northwest of Lagos, southwestern Nigeria. Originally settled by the Yoruba people, the locality was raided for slaves until the mid-19th century. Early in the 20th century it became an agricultural hinterland for Lagos; kola nuts were first grown in Nigeria in this area. The opening of the Lagos-Ibadan railway in 1901 and the growth of Lagos as a port transformed Ikeja into a residential and industrial suburb of that city. In the mid-1960s an industrial estate was established, and in 1975 Ikeja became the capital of the newly formed Lagos state.

The town's industrial estate contains cotton textile plants that are among Nigeria's largest, and there is also a wool textile plant. Other factories in Ikeja manufacture footwear, cosmetics, pharmaceuticals, plastics, paper and cork products, ceramics, paints, matches, and lightbulbs. There are a number of food processing plants and a large brewery in the town. Heavy industries include steel products, trailer-truck tanks, wire, aluminum, and rubber products. Several publishers and printers and import-export businesses are also centred at Ikeja.

The Lagos State Polytechnic (1977), the Federal Institute of Industrial Research (1955), a primary teachers' college, and a community nursing school are located in the town. The Lagos state radio broadcasting service also has its headquarters there. A housing project has been built in the town to help ease the overcrowding problems of Lagos. Murtala Muhammad international airport, serving Lagos, is located in Ikeja, and Nigeria Airways has its headquarters there. Pop. (2006) local government area, 313,196.