Cllr Roger Phillips says the move will lead to funding being drained away from the West Mercia Police force area - which includes Herefordshire - with a shift of funds to urban areas in and around Birmingham.
"West Mercia Police Authority is effective and efficient - it performs well and we want to keep it this way.
"Other forces West Mercia could have to merge with are debt-ridden and do not perform as well. This would be a retrograde step which would leach resources away from this county.
"These concerns are shared by Councils from both Worcestershire and Shropshire.
"We're also concerned at the proposed speed of change - a radical shake-up like this must be carefully thought through.
"We accept the police need to reconsider how they operate to tackle modern-day problems such as terrorism and computer fraud, but we do not want an ill-thought out knee-jerk reaction which will leave the rural shire counties with a less efficient police force," added Cllr Phillips.