Nicola de la Haye (c.1153—1230 CE) was a noblewoman who lived during the time of John I, King of England. She was the heir to Richard de la Haye, her father and a Lincolnshire baron. Her husband was William fitz Erneis, but he died in 1178 before they could have children. Before 1185 she married Gerard de Camville, the son and heir of Richard de Camville, who was an admiral that served under Richard Lionheart in the Crusades.
She inherited the office of castellan for Lincoln Castle upon the death of her father. The duties were usually overseen by her husbands, except when they were away. In 1191, Nicola held out against a month long siege, rallying her troops. In 1216, she was appointed Sheriff of Lincolnshire by John I. And in 1215—17, she fought against the rebel barons and Prince Louis of France, who had been promised the crown of England. She was successful, and, with the help of the regent of England (King John had died in 1216), she was able to stop the rebel barons and Prince Louis. With Nicola de la Haye’s help, the loyalists were able to put John’s son, Henry III, on the throne.