Sussex Police said it had cut its paper use in recent years
Sussex Police's use of 26 million sheets of paper last year has been described as an "appalling amount".
The force purchased 26,047,995 sheets, costing £97,637 in 2008/2009, according to a Freedom of Information request.
Sussex Police said it was working to reduce consumption and had used two million fewer than the previous year.
Sussex Police Authority member Ben Duncan, who is also a Green Party councillor in Brighton, said the figure needed to be cut further.
Mr Duncan said: "It's absolutely astonishing. It's an awful lot of paper and an awful lot of trees.
"I know from regular meetings that they've got procurement and people involved in managing the way that they handle their waste stream and so on to try and cut this."
He added: "It has come down quite a lot but it still is obviously an appalling amount of paper.
"They adopted various strategies like buying new printers. All new the printers that the police use have to print double sided to cut paper use and so on, so they are making some efforts but clearly they're not quite good enough."
A Sussex Police spokesman said they had reduced consumption from 5,100 sheets per annum/per employee to 3,900 sheets in recent years.
He added: "We are continually looking to improve the sustainability of our operations across Sussex Police with a view to sourcing sustainable products, reducing consumption, reducing waste and reducing the cost to taxpayers."