This is a complete database of AMS radiocarbon data from Lake Baikal sediment cores. Most radiocarbon data has already been published but is not easily accessible on a database. We also provide access to previously unpublished radiocarbon data from cores CON01-603-5 and CON01-605-5. The presented dataset amends previous reporting mistakes on the location of cores, the depth of samples and the Lab ID of some radiocarbon data. The data was collected for a currently unpublished study investigating the radiocarbon age offset (similar to reservoir age) in Lake Baikal.