<p>Resistive gas sensors are highly popular thanks to their high sensitivity, stability, fast dynamics and cheap price. ZnCo₂O₄ is a cobalt-based spinel oxide with high stability, high availability, low price, ease of synthesis, and semiconducting properties and therefore, it is a promising material for gas sensing purposes. It is used in the field of resistive gas sensors in different morphologies and compositional modifications. Herein, we have comprehensively reviewed the gas sensing capacity of ZnCo₂O₄. Pristine ZnCo₂O₄ gas sensors show good sensing properties, however their sensing performance can be increased by various strategies including doping, decoration, and heterojunction formation. Overall, ZnCo₂O₄-based gas sensors reveal good sensing properties towards various toxic gases at different temperatures. This shows high capability of this material as a good candidate detection of gases. We hope that the contents of present review article open new apertures and idea for the researchers working in this hot scientific field.</p>