Members of Unison, including community support officers and fingerprint experts, backed industrial action in protest at a 1% pay offer. Unions are seeking a 3% increase after wage freezes or below inflation deals for the past three years.
Unison general secretary Dave Prentis said: “These results send a clear message that after two years of pay freeze and last year’s below inflation pay rise, police staff have had enough and that they are now ready to take industrial action over pay.
“We are calling on the police employers to return to the negotiating table to improve the current pay offer.”
The union’s police sector committee will now meet to consider the ballot results and discuss the next move.
Unison members voted by around 60% in favour of strikes and 4-1 for other forms of industrial action.
Members of the GMB also voted in favour of strikes and other forms of action.
National officer Sharon Holder said: “Following the conclusion of the ballots, unions will now meet and announce the planned industrial action.”