<p>We present our methodology and data for science ready vertical carbon fluxes from a <i>Spartina alterniflora</i> tidal salt marsh as part of the Georgia Coastal Ecosystems Long Term Ecological Research (GCE-LTER) site on Sapelo Island, Georgia, USA. Vertical carbon fluxes were measured using the eddy covariance (EC) method from 2014 to 2024. The EC flux tower was located on the western side of Sapelo Island bounded by the Duplin River and Barn Creek. The proportional influence of marsh habitats on the flux measurements were 4% tall, 38% short, and 58% medium height form <i>Spartina alterniflora</i>. We provide the net ecosystem exchange (NEE), ecosystem respiration (ER), and gross primary production (GPP) at 30-minute fluxes (μmol CO₂ m⁻²s⁻¹), daily averages (μmol CO₂ m⁻²s⁻¹) and totals (g C m⁻² day⁻¹), and annual (g C m⁻² year⁻¹) quantities. We estimated uncertainty for each flux at each integrated timescale as 95% confidence intervals. Providing open access to 10-year carbon flux datasets can facilitate collaboration for advancing regional and global blue carbon synthesis and scale-up studies.</p>