In this work, we introduced K-C2, a dataset of 948 experimental acetylene, ethylene, and ethane isotherms from 192 MOFs curated from the literature to begin to address the challenge of identifying high-performing MOF adsorbents for C2 separations. In our dataset, we found that MOFs containing lanthanide metals are somewhat overrepresented in C2 separation studies relative to the CoRE MOF 2019 database, which is a snapshot of the broader MOF literature, but still only constitute ~2% of the dataset. We also found higher average surface areas and a lower proportion of open metal site MOFs in our dataset compared to CoRE MOF 2019. Using revised autocorrelation (RAC) graph-based descriptors, we observed a broader diversity in the secondary building unit (SBU) electronic environments in the CoRE database compared to the K-C2 dataset, suggesting that there is still ample chemical space to search for promising MOFs for C2 separations.