Dementia is an umbrella term used to describe a group of symptoms characterised by behavioural changes, loss of cognitive and social functioning brought about by progressive neurological disorders. It is estimated that around one million people live with a dementia in the UK, with that figure set to rise to 1.2 million by the year 2040. We are learning more about the risk factors for developing dementia over the life course. This paper discusses the non-modifiable and modifiable risk factors for dementia and considers health promotion and health education activities that can be used by community nurses.