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Salary Differences by Employment Situation. As of 2011, over half of all correctional officers were employed in state facilities, where they earned an average of $44,230 per year. Those working in local jails earned a little less on average, approximately $42,020 per year.
The median wage is the wage at which half the workers in an occupation earned more than that amount and half earned less. The lowest 10 percent earned less than $22,650, and the highest 10 percent earned more than $73,070. The median annual wage for correctional officers and jailers was $40,530 in May 2015. The lowest 10 percent earned less than $27,830, and the highest 10 percent earned more than $73,060.