In Rivers State, Nigeria, there are twenty-three (23) Local Government Areas (LGAs), including Ikwerre. Its main office is in the town of Isiokpo.

Every location in the LGA uses the same zip or postal code.

The postcode for Ikwerre areas is as follows:

Location Postcode
Umuchi 511101
Umukine 511101
Umukpuru 511101
Uuokela 511101
Omuoduku 511101
Omuota 511101
Ubabah 511101
Omuogboro 511101
Omuotiua 511101
Ubima 511101
Omukiole 511101
Omuogwor 511101
Omuotutua 511101
Ubiti 511101
Omukpiriku 511101
Omuohechi 511101
Omuoviri 511101
Ubordu 511101
Omukume 511101
Omuohia 511101
Omure 511101
Omukwata 511101
Omuohiaa 511101
Omute 511101
Omukwosi 511101
Omuohie 511101
Omutogbule 511101
Omumini 511101
Omuokiri 511101
Omuueka 511101
Omuna 511101
Omuokirika 511101
Omuuoda 511101
Omungbe 511101
Omuoko 511101
Omuwhiei 511101
Omunkpu-Omute 511101
Omuokpa-Omukuosi 511101
Omuwonini 511101
Omunkwo 511101
Omuolori 511101
Omuzua 511101
Omunobo 511101
Omuolu 511101
Onwali 511101
Omunwonjor 511101
Omuonua 511101
Orua 511101
Omuobaa 511101
Omuoparaaga 511101
Ozuaha 511101
Omuodu 511101
Omuosi 511101
Rumuekpe 511101
Nkaralua 511101
Omesiobi 511101
Omuchsor 511101
Omuiopi 511101
Obelle 511101
Omihua 511101
Omudagwa 511101
Omuketai 511101
Obelle-Edoha 511101
Omizua 511101
Omudari 511101
Obiti 511101
Omoawa 511101
Omudidia 511101
Obo 511101
Omobiri 511101
Omuechem 511101
Oborum 511101
Omuadi 511101
Omuegwa 511101
Ogankira 511101
Omuagu 511101
Omuehia 511101
Ogbasara 511101
Omuagubia 511101
Omuehie 511101
Ogbasara-Imea 511101
Omuagwewirie 511101
Omueke 511101
Ogboda 511101
Omuahunwo 511101
Omuele 511101
Okperekpe 511101
Omuchagor 511101
Omueze 511101
Omademe 511101
Omuchama 511101
Omugbala 511101
Omagwa 511101
Omuchetu 511101
Omuigwe 511101
Omaku 511101
Omuchi 511101
Omuigwe-Omute 511101
Omaraike 511101
Omuchinwo 511101
Omuike 511101
Omerelu 511101
Omuchiolu 511101
Omuikega 511101
Adanta 511101
Itu 511101
Agbaoga 511101
Mbunta 511101
Agwa-Nuahua 511101
Mgbaogba 511101
Agwara 511101
Mgbo 511101
Ahiniri 511101
Mgbodo 511101
Akpabu 511101
Mgbu-Ahana 511101
Aluu 511101
Mgbuanyuri 511101
Apani 511101
Mgbuefitibia 511101
Ekuche 511101
Mgbuhie 511101
Elele 511101
Mgbumini 511101
Ezeogo 511101
Mgbuodo 511101
Igwuruta 511101
Mgbuodukwu 511101
Igwuruta-Ali 511101
Mgbuogidi 511101
Imogu 511101
Mgbuokiri 511101
Ipo 511101
Mgbuokwukwu 511101
Isiokpo 511101
Mgbuonyi 511101