The two meetings - on Wednesday and Thursday - come before the deadline for the Local Development Plan public consultation on April 1st.
The information meetings are being organised by Plaid Cymru, which has consistently opposed plans to build on greenfield sites.
Carrie Harper, Plaid Cymru's candidate for Wrexham, said: "The Welsh Government is insisting that Wrexham Council allocates land for 12,000 homes in the borough by 2028. It's the green light for developers to build on playing fields and green fields across the borough rather than ensuring that affordable houses are built on brownfield sites.
"The council's original plan was rejected by the Planning Inspectorate, which insisted on these extra houses. The two biggest sites will basically be commuter estates. The first is 1260 houses planned for Lower Berse Farm between Ruthin Road and Bersham Road just off the A483.
"The second would be for 1500 homes on Ysgol Morgan Llwyd's playing fields and fields surrounding the rugby club down Brynestyn Lane.
"Our concerns are that these housing allocations are being made because the Welsh Government's population projections are for a 20% increase in the borough's population - far greater than any other part of Wales apart from Cardiff. There is no logic to this.
"The increase in housing would mean the loss of important green space and playing fields. It would also mean greater pressures on our schools, health and other public services at a time of cutbacks. Our hospital can't cope as things stand, imagine how things would be with an extra 30,000 people in the area.
"What this means specifically for Ysgol Morgan Llwyd is a loss of its existing playing fields - at a time when the school is expected to increase in numbers. Where exactly are those children expected to play if this house-building plan gets the go ahead?
"This would also pose huge challenges for our road and transport networks, which also struggles to cope at the moment. There is no infrastructure planning to meet this supposed demand and that's why we're calling for these huge housing schemes to be scrapped."
Mabon ap Gwynfor, Plaid's Clwyd South candidate, added: "The council's original plan consulted extensively with people and found an overwhelming majority in favour of maintaining our green fields and only building on former industrial or retail sites. The directive from the Welsh Government would see Wrexham's boundaries expand significantly to both the east and west and see green fields that separate the town from surrounding villages effectively disappear."
The public meetings are open to all and will outline the proposals and how they can be opposed. The first is at 7.30pm at Parciau Community Centre in Bellevue Park, Wrexham, on Wednesday and the second is at St John's Church on Borras Road (next to the Spider Park) in Acton, Wrexham. For more information contact Carrie Harper on firstname.lastname@example.org.
• The full list of candidate sites is at http://wrexhamldp.wrexham.gov.uk/ and you have until April 1 to object or make comments to email@example.com.