The multiplication or reproduction of cholangiocytes, resulting in the expansion of the cholangiocyte population. A cholangiocyte is an epithelial cell that is part of the bile duct. Cholangiocytes contribute to bile secretion via net release of bicarbonate and water. [ http://www.ncbi.nlm.nih.gov/pubmed/24434010 ]

Synonyms: hepatoblast proliferation