A joint initiative of the Volunteer Task Force and Joondalup Volunteer Resource Centre, it will be held at the Craigie Leisure Centre on Saturday, August 22, from 11am to 3pm.
More than 30 clubs, groups and organisations will have stalls to promote a range of volunteering opportunities.
Prospective volunteers can find out more about working in areas such as environmental conservation, homeless support and events.
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READ NOWThe inaugural expo held at Currambine Community Centre in June attracted about 300 people, including ECU student George Louis who signed up to become a volunteer at Joondalup Art Gallery.
The Joondalup resource centre, a partnership between the City of Joondalup and Volunteering WA, is a free referral service linking potential volunteers with 144 agencies in the Joondalup area.
Referral officers will be on hand at the expo to provide referrals.
Joondalup Mayor Troy Pickard said the resource centre had been integral in increasing volunteering in Joondalup to higher than the metropolitan average.
"The social return on investment has been extraordinary, a great example of what can be achieved through collaboration at the grassroots level," he said.
Volunteer Task Force chief executive Kath Snell encouraged people of all ages to attend.
"We are particularly excited about the Craigie expo as the Volunteer Task Force has held a social support presence there for many years," she said.
"We welcome current volunteers and those considering volunteering to the expo and look forward to welcoming all."
The final expo in the series is at Warwick Hall on November 25. Anyone wishing to attend should register online at joondalup.wa.gov.au or contact 9400 4734 for more information.