  We present a search for new high mass phenomena using the latest data
collected by the ATLAS detector at the LHC, corresponding to 36.1 fb$^{-1}$ at
$\sqrt{s}$ = 13 TeV. The search is conducted for both resonant and non-resonant
new phenomena in dimuon final states. The dimuon invariant mass spectrum is the
discriminating variable used in the search. No significant deviations from the
Standard Model expectation are observed. Lower limits are set on the signal
parameters of interest at 95% credibility level, using a Bayesian
interpretation. In particular, a Sequential Standard Model Z' resonance is
excluded for masses below 4.0 TeV.
