Rubicon: The Last Years of the Roman Republic is a non-fiction book written by Tom Holland, published in 2003.

The book tells the story of the end of the Roman Republic and the subsequent establishment of the Roman Empire. The book takes its title from the river Rubicon in the northern Italian peninsula. In 49 B.C., Julius Caesar crossed this river with his army and marched on Rome, breaking a sacred law of the Roman Republic and throwing the nation into a civil war.