nigerian-cities.php

<?php

return [
        'Abia' => [
            'Aba',
            'Arochukwu',
            'Umuahia',
        ],
        'Adamawa' => [
            'Jimeta',
            'Mubi',
            'Numan',
            'Yola',
        ],
        'Akwa Ibom' => [
            'Ikot Abasi',
            'Ikot Ekpene',
            'Oron',
            'Uyo',
        ],
        'Anambra' => [
            'Awka',
            'Okpoko',
            'Onitsha',
        ],
        'Bauchi' => [
            'Azare',
            'Bauchi',
            'Jama\'are',
            'Katagum',
            'Misau',
        ],
        'Bayelsa' => [
            'Brass',
        ],
        'Benue' => [
            'Gboko',
            'Makurdi',
            'Otukpo',
        ],
        'Borno' => [
            'Bama',
            'Biu',
            'Dikwa',
            'Kukawa',
            'Maiduguri',
        ],
        'Cross River' => [
            'Calabar',
            'Ogoja',
            'Ugep',
        ],
        'Delta' => [
            'Asaba',
            'Burutu',
            'Koko',
            'Sapele',
            'Ughelli',
            'Warri',
        ],
        'Ebonyi' => [
            'Abakaliki',
        ],
        'Edo' => [
            'Benin City',
            'Uromi',
        ],
        'Ekiti' => [
            'Ado Ekiti',
            'Effom-Alaiye',
            'Ijero',
            'Ikere-Ekiti',
            'Ilawe-Ekiti',
            'Ise-Ekiti',
        ],
        'Enugu' => [
            'Enugu',
            'Nsukka',
        ],
        'FCT (Federal Capital Territory)' => [
            'Abaji',
            'Bwari',
            'Abuja',
            'Gwagwalada',
            'Kuje',
            'Kwali',
        ],
        'Gombe' => [
            'Deba Habe',
            'Gombe',
            'Kumo',
        ],
        'Imo' => [
            'Okigwe',
            'Owerri',
        ],
        'Jigawa' => [
            'Birnin Kudu',
            'Dutse',
            'Garki',
            'Gumel',
            'Hadeija',
            'Kazaure',
        ],
        'Kaduna' => [
            'Jemaa',
            'Kaduna',
            'Zaria',
        ],
        'Kano' => [
            'Kano',
        ],
        'Katsina' => [
            'Daura',
            'Funtua',
            'Katsina',
        ],
        'Kebbi' => [
            'Argungu',
            'Birnin Kebbi',
            'Gwandu',
            'Yelwa',
        ],
        'Kogi' => [
            'Idah',
            'Kabba',
            'Lokoja',
            'Okene',
        ],
        'Kwara' => [
            'Ilorin',
            'Jebba',
            'Lefiagi',
            'Offa',
            'Pategi',
        ],
        'Lagos' => [
            'Badagry',
            'Epe',
            'Ikeja',
            'Ikorodu',
            'Lagos',
            'Mushin',
            'Shomolu',
            'Victoria Island',
        ],
        'Nasarawa' => [
            'Keffi',
            'Lafia',
            'Nasarawa',
        ],
        'Niger' => [
            'Agaie',
            'Baro',
            'Bida',
            'Kontagora',
            'Lapai',
            'Minna',
            'Suleja',
        ],
        'Ogun' => [
            'Abeokuta',
            'Ijebu-Ode',
            'Ilaro',
            'Obafemi-Owode',
            'Sagamu',
        ],
        'Ondo' => [
            'Akure',
            'Ikare',
            'Oka-Akoko',
            'Ondo',
            'Owo',
        ],
        'Osun' => [
            'Ede',
            'Gbongan',
            'Ikire',
            'Ikirun',
            'Ila',
            'Ile-Ife',
            'Ilesa',
            'Ilobu',
            'Inisa',
            'Iwo',
            'Osogbo',
        ],
        'Oyo' => [
            'Ibadan',
            'Igboho',
            'Iseyin',
            'Kisi',
            'Ogbomosho',
            'Oyo',
            'Saki',
        ],
        'Plateau' => [
            'Bukuru',
            'Jos',
            'Vom',
            'Wase',
        ],
        'Rivers' => [
            'Bonny',
            'Buguma',
            'Degema',
            'Eleme',
            'Okrika',
            'Port Harcourt',
        ],
        'Sokoto' => [
            'Sokoto',
        ],
        'Taraba' => [
            'Ibi',
            'Jalingo',
            'Muri',
        ],
        'Yobe' => [
            'Damaturu',
            'Gashua',
            'Bguru',
            'Potiskum',
        ],
        'Zamfara' => [
            'Gusau',
            'Kaura Namoda',
        ],
    ];

JSON version: https://gist.github.com/chrisidakwo/28f8dd7dabcfdb969032283d79f6b0d3