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Mangrove forests are paramount for sustaining and enhancing ecosystem services benefitting both local and regional communities, and the global environment. Scholars have long studied the values of ecosystem services of mangrove forests. However, the number of recent primary studies monetizing ecosystem services is rather limited. This paper ascertains the values of ecosystem services of 66 primary valuation studies with a total of 250 observations. The results indicate that the range of values is substantially wide. This range cannot be explained sufficiently by the various differences of the studies, as the explanatory power of the econometric estimations is low. Main influential factors on the values of ecosystem services are the elicitation methods, the types of ecosystem services considered, and the conservation status of the respective mangrove forest as Ramsar site. The results stress the significant economic values of ecosystem services of mangrove forests and the importance for conservation management. However, the results also caution against a direct transfer of benefits between sites. The substantial variety of site and country specifics warrants the implementation of separate, original valuation studies.