North Wales Police Authority is due to decide whether to oppose proposals for a single, all-Wales police force.
Reform of England and Wales' 43 forces is being considered
A possible merger of the four Welsh forces was raised last month in a report by Her Majesty's Inspectorate of Constabulary (HMIC).
Some members of North Wales Police Authority have said they are unhappy with the proposal, claiming it would weaken local policing.
The meeting of authority members takes place in Colwyn Bay on Friday.
The proposal to merge Wales' police forces - North Wales, South Wales, Dyfed-Powys and Gwent - is one option for police reform put forward by the HMIC, the body charged with improving the efficiency of the police in England and Wales.
The HMIC report, published in September, recommended mergers to create 30 larger forces.
Of the Welsh forces, only South Wales Police comes close to the preferred minimum size of 4,000 officers.
Other possibilities include merging the current four forces into two, or leaving things as they are.
The possibility of mergers between England and Wales' 43 police forces was also raised by Home Secretary Charles Clarke earlier this year when he said he did not believe the existing number was "the best way we should organise ourselves".
The North Wales Police Authority meets at the force's headquarters in Colwyn Bay to give its response to the proposals.
Some members have already said they would not support the idea of an all-Wales police force, claiming it would weaken local policing.
Eifion Jones, who represents Anglesey on the police authority, said the north Wales force currently worked more closely with forces in the north west of England than their Welsh counterparts.
He added: "I have real concerns involving an all-Wales force.
Dyfed-Powys and Gwent Police may be merged under the plans
"There is a real problem with the geography of Wales and┐we don't want to be run from a Cardiff-based unit.
"North Wales Police at the moment work very closely with the north west of England and operationally that's a very strong connection.
"It is a weak connection with the rest of Wales."
Paul Murphy, Labour MP for Torfaen, which is in the Gwent Police area, said that if there is a merger of the Welsh forces, they should find a way to keep the existing structure.
He added: "Geographically, we are a very diverse country in Wales.
"I think we could keep as far as we can to the boundaries of the police forces which are tried and tested and which are accountable to local people within such a structure.
"For example, I suppose you could have a deputy chief constable for north Wales, a deputy for Gwent and for whatever other regions they decide to deal with."