Infectious laryngotracheitis (ILT) is a contagious viral respiratory disease, primarily of chickens and gamebirds, that can cause elevated morbidity and mortality. Based on the results of the Disease Surveillance in Ontario Non-commercial Poultry Flocks study conducted from 2015-2017, small non-commercial chicken flocks are more likely to be infected with the ILT virus than commercial chicken flocks. ILT related morbidity and mortality was diagnosed in 9 % of the chicken submissions. An additional 7.5 % of the submissions were shown to be latent carriers (not exhibiting any clinical signs) of the ILT virus. These birds could shed the virus through respiratory and ocular secretions, putting the rest of the resident flock at risk of developing clinical disease. If these birds were introduced into a naïve flock, an outbreak of ILT would probably occur.