Monuments and memorials to Horatio Nelson, 1st Viscount Nelson

Horatio Nelson, 1st Viscount Nelson (1758–1805) was a British flag officer in the Royal Navy famous for his participation in the Napoleonic Wars, most notably in the Battle of Trafalgar, during which he was killed. He was responsible for several famous victories that helped to secure British control of the seas, both securing Britain from French invasion and frustrating Napoleon's imperial ambitions. After his death during his defeat of the combined French and Spanish fleets at Trafalgar, there was a public outpouring of grief. Nelson was accorded a state funeral and was buried in St Paul's Cathedral.

A number of monuments and memorials were constructed across the United Kingdom of Great Britain and Ireland to honour his memory. The period of British dominance of the seas that his victories were considered to have ushered in led to a continued drive to create monuments in his name across the British Empire. These have taken many forms.