Electrons constitute an essential component of final states from the leptonic decay channels of W and Z bosons. Their reconstruction and identification are especially challenging in heavy-ion collisions due to high detector occupancy. Therefore, the evaluation of electron performance is crucial for precision measurements of properties of quark-gluon plasma produced in heavy-ion collisions at the LHC energies. The measurements focus on electron reconstruction, identification, isolation, and trigger performance in p+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV collected by the ATLAS experiment in 2016. The data correspond to a total integrated luminosity of 165 nb$^{-1}$. The Tag-and-Probe method is applied, which allows for the estimation of electron efficiency independently in data and Monte Carlo simulation.