West Midlands, West Mercia, Warwickshire and Staffordshire Police have submitted their responses to plans to restructure the country's forces. All four have included merging into a strategic regional body as one of their options, the strongest option according to West Midlands Police.
West Midlands, West Mercia and Staffordshire also include staying as they are as one their options.
The Home Secretary plans to reduce the number of forces from 43 to 30.
The reorganisation of the UK's policing is in response to the increased threat from serious and organised crime, terrorism and extremism.
The government will give feedback to the various forces in November.
On Thursday, West Midlands Police was named as the best performing metropolitan force in the country for the second year running.
Its options also include a smaller merger between Warwickshire and West Midlands.
West Midlands Police Chief Constable, Paul Scott-Lee, said: " We welcome this opportunity to shape policing for the future.
"Our scoring using the Home Office assessment criteria shows the regional option, to merge with West Mercia, Staffordshire and Warwickshire Police, is the strongest one.
"There is still much work to do and whilst the regional option in our assessment is the strongest, it may not end up as the preferred one.
'Local views important'
"The Home Office have yet to examine all options submitted and give us their views."
A strategic regional force would operate with more than 13,000 police officers and about 21,000 staff.
West Mercia Police said it was still to agree on a single preferred option and is also considering the possibility of merging with Staffordshire and Gloucestershire.
Chief Constable Paul West said: "The views of local stakeholders, partners and citizens are very important and I urge local people to share their thoughts with us."
Warwickshire Police said early consultation suggested the most desirable option was to join with the whole region - it will be holding public meetings.
Staffordshire Police Authority revealed its plans last week and said the option to stay as it is was was viewed as a serious option for consideration.
They have also submitted plans for the amalgamation of Staffordshire Police and West Mercia Police.
Final detailed proposals will be submitted to the Home Office by 23 December.
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Whilst the regional option in our assessment is the strongest, it may not end up as the preferred one
