The average aide salary at Seneca Elem. was $31,877 , which is 38 percent higher than the average salary for this job in Missouri, but 1 percent lower than the national average for this job . Aide salaries at Seneca Elem. typically range from $21,325 to $39,336 (25th to 75th percentile). The highest reported aide salary was $42,921. There are 7 employees at Seneca Elem. with the job title aide.