The Republic of the Congo's sparse population is concentrated in the southwestern portion of the country, leaving the vast areas of tropical jungle in the north virtually uninhabited.

Source: UN DESA, World Population Prospects, 2022[8] Total Fertility Rate (TFR) (Wanted Fertility Rate) and Crude Birth Rate (CBR):[9] Fertility data as of 2011-2012 (DHS Program):[10] Languages spoken here include French (official), Kituba or Monokutuba (lingua franca), Kongo or Kikongo, Lingala, and many local languages and dialects.

The adult prevalence rate for HIV/AIDS was 3.4% as of 2009, representing 77,000 people living with the disease and 5,100 deaths.

The Republic of the Congo is considered to have a high degree of risk of infectious diseases, particularly bacterial diarrhea, hepatitis A and typhoid fever (all food- or waterborne), and malaria (vectorborne).

This article incorporates public domain material from The World Factbook (2025 ed.).