AbstractElectrocatalytic water splitting is a promising approach for clean and sustainable hydrogen production. Its large‐scale application relies on the availability of low cost and efficient electrocatalysts. Earth‐abundant transition‐metal carbides, especially molybdenum carbides (MoxC), are regarded as potential candidates to replace state‐of‐art but expensive platinum‐group electrocatalysts. In this Review, we summarize recent progress in MoxC electrocatalysts for hydrogen evolution reaction (HER). Nanostructure engineering on the design and preparation of highly efficient electrocatalysts based on MoxC is presented, followed by the comparison and discussion of HER performance on MoxC‐based electrocatalysts. Finally, we offer a perspective on the future development of MoxC‐based electrocatalysts towards HER.