To determine the methane emission intensities (EIs) in St. Petersburg and its suburbs measurements of the methane (CH4) mole fraction and total column were used, the analysis of which was carried out using the mass balance method. For the suburban territory the value of EIs was estimated from the events of nocturnal accumulation which were detected using continuous CH4 mole fraction measurements at the atmospheric monitoring station of Saint Petersburg State University (SPbU) located in Peterhof. It was obtained that EI values for 2014-2015 for St. Petersburg suburbs were of (44±27) t/(km2 ∙year). The determination of EI for the St. Petersburg territory including the area of the city center was carried out using two approaches: first, using local CH4 concentrations monitored at SPbU and Voeikov MGO stations, and second, using the results of an observational campaign in March-April 2019 jointly organized by Saint Petersburg State University, Karlsruhe Institute of Technology, the University of Bremen. EI values for the city center derived using the first approach - 120±80 t/(km2 ∙year), according to the approach based on results of observational campaign - 141±78 t/(km2 ∙year).