Representatives from organisations including Wiltshire Police, Wiltshire Council and charities will be in Hillworth Park to provide free advice.
The multi-agency day is on Friday, August 1 from 10am-3pm. Other organisations will include the Wiltshire Bobby Van Trust, Community First, Combat Stress, Aster and Wiltshire Fire and Rescue Service.
PCSO Luke Woodward, of Devizes Neighbourhood Policing Team, said: “The day is being held to promote services that operate in the Devizes area. It will not only be a day to seek advice, but also to learn a little about what these organisations do and have some fun in the process.
“Devizes doesn’t currently have a day like this on the calendar where so many organisations are pulled together in one place, and the list is constantly growing.”