This study evaluates the contamination by heavy metals of the grounds taken in four of the public landfills in the districts of Brazzaville. Soil samples taken at a depth of 25 cm first underwent some physical treatment (drying, sieving and grinding) before undergoing physicochemical analyzes and determination of heavy metals by ICP-OES. Physicochemical analyzes showed that Landfill soils are heavily contaminated with heavy metals: lead (Pb), chromium (Cr), cobalt (Co), nickel (Ni), mercury (Hg) and zinc (Zn). The highest levels of these heavy metals are as follows: lead (220 mg/kg) in the soils of the Tsiémé landfill; chromium (13000 mg/kg), cobalt (160 mg/kg), nickel (7500 mg/kg) and zinc (12000 mg/kg) in the soils of the Diata landfill and mercury (0.66 mg/kg) in the soils of the Moukondo landfill. Mercury is also present in these four landfills but in small quantities.