Among bioactive constituents occurring in mushrooms, phenolic compounds focus attention due to their antioxidant activity. Also, a special attention is given to mushrooms secreting extra cellular enzymes such as lignin peroxidases (LiP), manganese peroxidase (MnP) and laccase (Lac), enzymes which can be used in biodegradation processes. The aim of the present study was to investigate ten mushroom species for total phenolic compounds, lignocellulolytic enzymes and for their synthetic dyes decolourisation potential. For this purpose, 70% ethanol extracts of ten dried mushrooms were analysed using spectrophotometric methods. The results revealed that total phenolic compounds in the extracts were the highest in A. campestris, P. ostreatus var. Florida and T. versicolor. Laccase activity showed high values in extracts from P. ostreatus var. Florida, A. campestris, L. edodes, and G. applanatum. Lignin peroxidases (LiP) activity showed high values in extracts from A. campestris, F. velutipes, P. ostreatus var. Florida and T. versicolor, whereas manganese peroxidase (MnP) activity was highest in extracts from P. ostreatus var. Florida, A. campestris and G. applanatum. It was found that some of the fungal extracts showed high activities in decolorizing of synthetic dyes.