  The search for supersymmetry with the ATLAS experiment at the CERN Large
Hadron Collider intensified after the discovery of the Higgs boson in 2012. The
search programme expanded in both breadth and depth, profiting from the
increased integrated luminosity and higher centre-of-mass energy of Run 2, and
gaining new sensitivity to unexplored areas of supersymmetry parameter space
through the use of new experimental signatures and innovative analysis
techniques. This report summarises the supersymmetry searches at ATLAS using up
to 140 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 13$ TeV, including the
limits set on the production of gluinos, squarks, and electroweakinos for
scenarios either with or without R-parity conservation, and including models
where some of the supersymmetric particles are long-lived.
