Atmospheric methane (CH4) impact climate change. Monitoring its levels and emission sources is vital. Rivers State, Nigeria, emits CH4 from oil, gas, and wetlands. The datasets and observations originating from the Sentinel-5 Precursor (S5P) satellite, specifically those gathered by the Tropospheric Monitoring Instrument (TROPOMI), studies CH4 concentration over Rivers State, Nigeria, from 2020 to 2024. Methane data analyzed for maps & time series. Avg. methane concentrations. in Rivers State, Nigeria was 1909 ppb, exceeding global avg. of 1866 ppb but lower than US oil & gas-rich regions at 2000 ppb. CH4 levels vary spatially in Rivers State, with higher concentrations near oil & gas infra, industry, urban areas, & wetlands. Hotspots align with emission sources. S5P/TROPOMI data assists CH4 monitoring in data-limited regions & identifies emission reduction needs & research areas in Rivers State, providing insights for climate change actions in the Niger Delta.