Koidu

Koidu Town is a major urban, business, commercial and diamond trade center. Two of the world's ten largest and most famous rough diamonds were found in the Woyie River that flows through Koidu Town.

The mayor of Koidu City and members of the Koidu-New Sembehun city council are directly elected every four years. The current mayor of Koidu Town is Komba Sam of the Sierra Leone People's Party political party. Koidu is not a stronghold of any political party; the city is home to large support of both the Sierra Leone People's Party and the All People's Congress.

Koidu is one of the most ethnically and religiously diverse cities in Sierra Leone. The city is inhabited by many ethnic groups, with no ethnic group forming a majority. The Krio language is by far the most widely spoken language in Koidu Town and is the primary language of communication in the city. Sierra Leone's vice president Mohamed Juldeh Jalloh, Sierra Leone's First Lady Fatima Bio and Sierra Leone's former vice president Samuel Sam-Sumana were born and raised in the city.