The average aide salary at Niangua Elem. was $26,912 , which is 16 percent higher than the average salary for this job in Missouri, but 17 percent lower than the national average for this job . Aide salaries at Niangua Elem. typically range from $29,290 to $30,640 (25th to 75th percentile). The highest reported aide salary was $31,090. There are 6 employees at Niangua Elem. with the job title aide.