This data set of two-week integrated 14C-CO2 observations from Cape Grim Baseline monitoring station (40.68°S, 144.69°E, 94m a.s.l.) are displayed in Figure 1 of Levin et al. 2022 (Continuous measurements of 14C in atmospheric CO2 at Cape Grim, 1987-2016, in: Baseline Atmospheric Program (Australia) 2014-2016, Australian Bureau of Meteorology and CSIRO Atmospheric Research, Melbourne, Australia 2022). Earlier results had been published by Levin et al. (2010: DOI: 10.1111/j.1600-0889.2009.00446.x.). The current data set replaces the earlier releases; data have been carefully re-evaluated and quality controlled, and thus provide the most accurate Heidelberg 14C-CO2 data set available for Cape Grim.