Wetlands such as marshes can sequester atmospheric carbon in plants and soils while emitting methane, a potent greenhouse gas. Marsh restoration projects have been carried out in the Big Creek Watershed of Southern Ontario since 2011. These projects have restored agricultural land into marshes of varying ages and environmental characteristics. To evaluate the potential for wetland restoration to contribute to nature-based climate change solutions, this study quantifies the amount of methane released by restored marshes and the factors influencing these emissions in the Big Creek Watershed. Methane emissions were measured using manual static chambers in 12 restored marshes and 2 natural marshes covering approximately 19 ha during a wet summer (2024) and relatively dry summer (2025). Eddy covariance flux measurements were also made at one of the restored sites over the two years. Methane emissions measured with chambers varied by several orders of magnitude within and among the different sites (median and range: 0.85 and -0.71 – 996.05 mg C-CH4 m-2 hour-1, respectively). At the flux tower, methane emissions were less variable and lower in 2025 when it was dry but generally increased with warmer temperatures. The relationships between methane emissions and soil characteristics, water chemistry and meteorological conditions will be used to identify the factors that influence emission rates. Using supplementary upland chamber measurements of methane exchange, this study will estimate landscape-scale methane emissions. Moreover, it will evaluate the impact of wetland restoration on the methane budget of this region to help inform future wetland restoration and management strategies.