ABSTRACT We constrain cosmological parameters from a joint cosmic shear analysis of peak-counts and the two-point correlation functions, as measured Dark Energy Survey (DES-Y1). find structure growth parameter $S_8\equiv \sigma _8\sqrt{\Omega _{\rm m}/0.3} = 0.766^{+0.033}_{-0.038}$ which, at 4.8 per cent precision, provides one tightest constraints on S8 DES-Y1 weak lensing data. In our simula...