MicroRNAs (miRNAs/miRs) are endogenous, small non‑coding RNAs conserved across species that post‑transcriptionally regulate gene expression by both suppressing translation and inducing mRNA degradation. miRNAs are found in various tissues, exhibit variable expression and their dysregulation is implicated in numerous disease processes. Furthermore, miRNA expression levels have a key role in the normal development of kidney tissue and are key regulators of kidney function, modulating diverse biological processes across renal cell lineages. miR‑378 participates in pathological processes associated with kidney diseases, including kidney cancer, kidney transplantation and diabetic nephropathy. Despite its considerable effects on these conditions, a comprehensive summary of the roles of miR‑378 is unavailable. In the present review, the existing literature on miR‑378 in kidney diseases is consolidated, and its validated gene targets and biological effects in both malignant and non‑malignant conditions are highlighted, thereby providing a foundation for future research.