Genua is a fictional city from Terry Pratchett's Discworld novels. Its most significant appearance in the books is in Witches Abroad. It is in an area called the Swamplands, some distance from the Sto Plains/Ramtops locations of most of the books.

The name Genua is likely based on Genoa, a city in Italy, however Genua bears a striking resemblance to the American South, especially New Orleans. During the events of Witches Abroad the city was ruled by an evil fairy godmother, who was obsessed with fairy tales and thought she could force everyone to be happy. Under her rule the city most obviously resembled a skewed version of Disneyland.

Genua was most likely established as a far flung colony of the Morporkian Empire, thus explaining why it shares more similarities with Ankh-Morpork/Sto Plains than its immediate neighbours Überwald and Muntab. The state first gained power under General Tacticus, who, having being sent there by the Morporkian Empire to stay out of the way, preceded to conquer the patron state.

According to the novel Going Postal Genua is located approximately 2000 miles from Ankh-Morpork by road, a journey of two months by stagecoach. A faster method is to travel by flying broomstick, whereby the city can be reached in a single day.