The Venetian navy was the navy of the Venetian Republic which played an important role in the history of the republic and the Mediterranean world. It was the premier navy in the Mediterranean Sea for many centuries between the medieval and early modern periods, providing Venice with control and influence over trade and politics far in excess of the republic's size and population. It was one of the first navies to mount gunpowder weapons aboard ships, and through an organised system of naval dockyards, armouries and chandlers was able to continually keep ships at sea and rapidly replace losses. The Venetian Arsenal was one of the greatest concentrations of industrial capacity prior to the Industrial Revolution and responsible for the bulk of the republic's naval power.

The Republic of Venice or Venetian Republic, traditionally known as La Serenissima, was a sovereign state and maritime republic in parts of the present-day Italian Republic, Istria and Dalmatia that existed for 1,100 years from 697 until 1797. Centered on the lagoon communities of the prosperous city of Venice, it incorporated numerous overseas possessions in modern Croatia, Slovenia, Montenegro, Greece, Albania and Cyprus. The republic grew into a trading power during the Middle Ages and strengthened this position during the Renaissance. Most citizens spoke the Venetian language, although publishing in Italian became the norm during the Renaissance.