Keratitis-ichthyosis-deafness (KID) syndrome is a rare genetic disorder characterized by deafness, corneal defects, and thickened, scaly skin and associated with mutations in Connexin26 (Cx26), resulting in the formation of hyperactive hemichannels that disrupt calcium (Ca2+) transfer. Ca2+ is crucial for normal epidermal cell function and may contribute to characteristics of KID syndrome. While unregulated Ca2+transfer through aberrant Cx26 hemichannels is known to impact keratinocyte proliferation and differentiation, the specific mechanisms remained unclear. An increase in the molecules associated with the nuclear factor-κB (NF-κB) signaling pathway was observed in the D50Y mutation of KID syndrome. This suggests that Cx26 mutant channels may disrupt keratinocyte physiology through NF-κB signaling. Our study hypothesizes that Ca2+ signals altered due to Cx26 mutations affect the NF-κB pathway, potentially contributing to KID syndrome by modifying keratinocyte cell physiology. Our study showed that NF-κB activation significantly increased in D50Y cells, linked to hyperproliferation and activation was dependent on intracellular Ca2+. This was associated with increased p65 activation and nuclear localization due to hyperactive Cx26 channels in D50Y cells. These findings reveal a direct link between aberrant Ca2+transport through Cx26 channels due to the D50Y mutation and NF-κB activation, shedding light on the hyperproliferative characteristics of Cx26 D50Y KID syndrome. Our goal was to understand how Ca2+ mechanisms impact the NF-κB pathway, potentially altering the physiology of keratinocytes expressing D50Y and G45E mutations. This research offers insights into the potential targeting of the NF-κB pathway for treating KID syndrome caused by Cx26 mutations.