Methane (CH₄) emissions from the boreal–Arctic region are globally significant, but the current magnitude of annual emissions is not well defined. Here we present a dataset of surface CH₄ fluxes from northern wetlands, lakes, and uplands that was built alongside a compatible land cover dataset, sharing the same classifications. We show CH₄ fluxes can be split by broad land cover characteristics. The dataset is useful for comparison against new field data and model parameterization or validation.