More than 90 percent of all elementary, middle and high school teachers in Prince William County who responded to a recent survey said they were dissatisfied with their salaries.

The survey was conducted by county's Federation of Teachers and more than 1,300 of the county's 2,144 teachers responded. Among the other items receiving unsatisfactory ratings were preparation time, take home work, clerical help, negotiations and retirement benefits.

The association survey also showed that teachers are more dissatisfied with their salaries than anything else. According to Cathy McMurtrey, president of the county's parent-teacher coalition, a total of 82 percent of the association's respondents named salary and the salary schedule (the rate at which teachers reach their highest pay level) as the highest priority facing the meet-and-confer teams this year. School Superintendent Richard Johnson has recommended a 10 percent pay increase for teachers for next year's school budget package. The School Board, which said it would support such an increase, plans to meet with the Board of Supervisors this week to request an additional $12 to $15 million in the 1985-86 budget to pay for the increase as well as cost-of-living raises.

The highest rate of response to the federation's survey, 38 percent, came from elementary school teachers, followed by middle school teachers at 33 percent and 29 percent of all high school teachers. More than 60 percent of the responding teachers rated seven items satisfactory. They were: student discipline, health and safety, teacher workdays, personal rights, parental cooperation, paid leaves and administration support of student discipline.