diff --git a/definitions/region/african_subregions.yaml b/definitions/region/african_subregions.yaml
index 8bab67e..3849853 100644
--- a/definitions/region/african_subregions.yaml
+++ b/definitions/region/african_subregions.yaml
@@ -21,3 +21,103 @@
         Zambia, Zimbabwe
 - Africa:
   - Africa
+
+# Nigerian zones and states defined according to:
+#  - https://maps-nigeria.com/map-of-nigeria-showing-the-six-geopolitical-zones
+#  - https://en.wikipedia.org/wiki/States_of_Nigeria
+
+- Nigeria Zones:
+  - Nigeria Zones|North Central:
+      description: >
+        Benue, Kogi, Kwara, Nasarawa, Niger, Plateau, Federal Capital Territory
+  - Nigeria Zones|North East:
+      description: >
+        Adamawa, Bauchi, Borno, Gombe, Taraba, Yobe
+  - Nigeria Zones|North West:
+      description: >
+        Jigawa, Kaduna, Kano, Katsina, Kebbi, Sokoto, Zamfara
+  - Nigeria Zones|South East:
+      description: >
+        Abia, Anambra, Ebonyi, Enugu, Imo
+  - Nigeria Zones|South South:
+      description: >
+        Akwa Ibom, Bayelsa, Cross River, Delta, Edo, Rivers
+  - Nigeria Zones|South West:
+      description: >
+        Ekiti, Lagos, Ogun, Ondo, Osun, Oyo
+
+- Nigeria States:
+  - Nigeria States|Abia:
+      description: "Known for its commercial hub in Aba, rich in textile and handicrafts."
+  - Nigeria States|Adamawa:
+      description: "Features diverse landscapes from mountains to valleys, with a rich cultural heritage."
+  - Nigeria States|Akwa Ibom:
+      description: "Boasts beautiful beaches and a strong oil and gas industry."
+  - Nigeria States|Anambra:
+      description: "Rich in history and culture, with a vibrant economy centered around commerce and agriculture."
+  - Nigeria States|Bauchi:
+      description: "Home to the Yankari National Park, offering a glimpse into Nigeria's wildlife."
+  - Nigeria States|Bayelsa:
+      description: "Predominantly riverine, crucial to the oil sector, with extensive mangrove forests."
+  - Nigeria States|Benue:
+      description: "Known as the 'Food Basket of the Nation,' with agriculture as its backbone."
+  - Nigeria States|Borno:
+      description: "Features the Sambisa Forest and a history marked by the Boko Haram insurgency."
+  - Nigeria States|Cross River:
+      description: "Hosts the annual Calabar Carnival and is known for its conservation efforts and tourism."
+  - Nigeria States|Delta:
+      description: "Rich in oil and diverse cultures, with significant contributions to Nigeria's economy."
+  - Nigeria States|Ebonyi:
+      description: "Known for its rice production and as a leading state in agriculture."
+  - Nigeria States|Edo:
+      description: "Historically significant with the ancient Benin Kingdom and a vibrant culture."
+  - Nigeria States|Ekiti:
+      description: "Rich in cultural festivals and known for its educational institutions."
+  - Nigeria States|Enugu:
+      description: "Known for its coal mining history and the picturesque Ngwo Pine Forest."
+  - Nigeria States|Gombe:
+      description: "Features savannah landscapes and is an emerging center for commerce and agriculture."
+  - Nigeria States|Imo:
+      description: "Home to oil production, agriculture, and the famous Oguta Lake."
+  - Nigeria States|Jigawa:
+      description: "Characterized by its arid climate and agriculture, particularly millet and sorghum."
+  - Nigeria States|Kaduna:
+      description: "A major industrial and political hub with a rich colonial history."
+  - Nigeria States|Kano:
+      description: "One of Nigeria's oldest cities, pivotal in trade and Islamic scholarship."
+  - Nigeria States|Katsina:
+      description: "Steeped in history with ancient city walls and a strong agricultural base."
+  - Nigeria States|Kebbi:
+      description: "Notable for Argungu Fishing Festival and a strong agricultural sector, especially rice."
+  - Nigeria States|Kogi:
+      description: "Where the Niger and Benue Rivers meet, with a rich cultural and natural diversity."
+  - Nigeria States|Kwara:
+      description: "Known for its harmony among diverse ethnic groups and agricultural activities."
+  - Nigeria States|Lagos:
+      description: "Nigeria's economic powerhouse, with a vibrant culture, commerce, and entertainment scene."
+  - Nigeria States|Nasarawa:
+      description: "Rich in mineral resources and agriculture, with a diverse ethnic composition."
+  - Nigeria States|Niger:
+      description: "Home to the Kainji National Park and the Jebba Dam, important for hydroelectric power."
+  - Nigeria States|Ogun:
+      description: "Notable for its industrial estates and as the birthplace of many Nigerian leaders."
+  - Nigeria States|Ondo:
+      description: "Rich in cocoa production and blessed with natural beauty, including lengthy coastlines."
+  - Nigeria States|Osun:
+      description: "Hosts the famous Osun-Osogbo Sacred Grove, a UNESCO World Heritage site."
+  - Nigeria States|Oyo:
+      description: "Historically significant with the ancient city of Ibadan and a strong agricultural sector."
+  - Nigeria States|Plateau:
+      description: "Known for its scenic landscapes and cooler climate, with a rich cultural heritage."
+  - Nigeria States|Rivers:
+      description: "A key player in Nigeria's oil industry, with a rich cultural tapestry and Port Harcourt as its capital."
+  - Nigeria States|Sokoto:
+      description: "Center of Islamic scholarship and the seat of the Sokoto Caliphate."
+  - Nigeria States|Taraba:
+      description: "Diverse in flora and fauna, with the Mambilla Plateau as a key feature."
+  - Nigeria States|Yobe:
+      description: "Features part of the Sahara Desert and is primarily focused on agriculture."
+  - Nigeria States|Zamfara:
+      description: "Rich in agriculture and mining, with a history of ancient kingdoms."
+  - Nigeria States|Federal Capital Territory:
+      description: "Home to Abuja, Nigeria's capital, symbolizing unity and central governance."