The average aide salary at Onalaska was $16,734 , which is 50 percent lower than the average salary for this job in Washington, and 48 percent lower than the national average for this job . Aide salaries at Onalaska typically range from $14,415 to $18,971 (25th to 75th percentile). The highest reported aide salary was $23,720. There are 30 employees at Onalaska with the job title aide.