Growing Season Length (GSL) indices have been calculated at stations across Europe using both the ETCCDI definition and a definition based on an EEMD time-series decomposition using daily mean temperature values. These files contain values of the GSL at European stations, taken from the ECA&D repository, and at three sites (Central England Temperature [CET], Stockholm and St. Peterburg) which provide data, over a much longer period (1772 in the case of the CET series). These data are used in a paper published in the International Journal of Climatology (doi:10.1002/joc.5913).