Arrests of children across the county have fallen by 69 per cent in five years.
Figures obtained by the Howard League for Penal Reform show the figure across West Yorkshire has dropped from 19,706 in 2008 to 6,148 in 2013.
Howard League chief executive Frances Crook said: “Most police services in England and Wales have developed successful local initiatives that resolve issues quickly and cheaply, involve victims in the justice process and, crucially, avoid criminalising boys and girls.
“A sharp fall in the number of children entering the justice system is good news for everyone striving to reduce crime and saves the taxpayer untold millions.
“At a time of austerity, further reducing the number of children arrested would free up more officer time to deal with serious crimes.”