How Much Does an Onsite Administrative Assistant make?

Onsite Administrative Assistant made a median salary around $62,873 in April, 2025. The best-paid 25 percent made $70,354 probably that year, while the lowest-paid 25 percent made around $56,201. Salary ranges can vary widely depending on many important factors, including education, certifications, additional skills, the number of years you have spent in your profession. With more online, real-time compensation data than any other website, Salary.com helps you determine your exact pay target.
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Best-Paying Cities for Onsite Administrative Assistant

The metropolitan areas that pay the highest salary in the Onsite Administrative Assistant profession are Kansas City , Riverside , Waldron , Independence , Liberty .
Kansas City, MO $64,500
Riverside, MO $64,500
Waldron, MO $64,441
Independence, MO $64,428
Liberty, MO $64,395

Best-Paying States for Onsite Administrative Assistant

The states and districts that pay Onsite Administrative Assistant the highest salary are District of Columbia (around $73,269) , California (around $72,991) , Massachusetts (around $72,018) , Washington (around $71,753) , and New Jersey (around $71,727) .
District of Columbia $73,269
California $72,991
Massachusetts $72,018
Washington $71,753
New Jersey $71,727

What is the Career Path of Onsite Administrative Assistant?

A career path is a sequence of jobs that leads to your short- and long-term career goals. Some follow a linear career path within one field, while others change fields periodically to achieve career or personal goals.

The first career path typically progresses to Administrative Assistant IV.
Besides, Onsite Administrative Assistant can also turn to other related jobs, including Medical Assistant onsite , Clinical Research Onsite Monitoring Supervisor , Administrative Assistant I and Administrative Assistant II .

Frequently Asked Questions for Onsite Administrative Assistant

Q: What is the salary range of Onsite Administrative Assistant in Missouri?
A: In 2025 , the lowest-paid Onsite Administrative Assistant in Missouri earned an average annual salary of $56,201 , while the highest-paid made $70,354.
Q: What is the salary for an Onsite Administrative Assistant in California?
A: Onsite Administrative Assistant employed in California earned an average salary of $72,991 in 2025.

Average Onsite Administrative Assistant Pay vs. Other Jobs

Onsite Administrative Assistant earned an average salary of $62,873 in 2025. Other jobs related to Onsite Administrative Assistant earned the following average salary in April, 2025. Medical Assistant onsite made $41,591 , Clinical Research Onsite Monitoring Supervisor made $122,730 , Administrative Assistant I and Administrative Assistant II made $44,589 and $51,902 respectively .

Relevant Jobs of Onsite Administrative Assistant

Medical Assistant onsite - Average Salary $41,591
There is currently no job description for Medical Assistant onsite, be the first to submit the job responsibilities for Medical Assistant onsite.
The Clinical Research Onsite Monitoring Supervisor monitors and ensures all clinical research trials are conducted, recorded, and reported in adherence to established processes and procedures, FDA regulatory requirements, Good Clinical Practice (GCP) research standards, and all other applicable regulatory requirements. Supervises the team responsible for monitoring clinical research trials across multiple study sites. Being a Clinical Research Onsite Monitoring Supervisor may assist with design, development, and monitoring of clinical evaluation projects. Verifies data collected is accurate and complete. In addition, Clinical Research Onsite Monitoring Supervisor requires a bachelor's degree. May require ACRP or SOCRA certification. Typically reports to a manager. The Clinical Research Onsite Monitoring Supervisor supervises a group of primarily para-professional level staffs. May also be a level above a supervisor within high volume administrative/production environments. Makes day-to-day decisions within or for a group/small department. Has some authority for personnel actions. Working as a Clinical Research Onsite Monitoring Supervisor typically requires 3-5 years experience in the related area as an individual contributor. Thorough knowledge of functional area and department processes.
Administrative Assistant I - Average Salary $44,589
Administrative Assistant I provides administrative support to an individual, team, department or group in an organization. Collects, reviews and analyzes data and prepares reports, charts, budgets, and other presentation materials utilizing word processing, spreadsheet, or specialized software. Being an Administrative Assistant I prepares and distributes reports or other communications on a regular schedule. Maintains files, databases, and archives of relevant records. Additionally, Administrative Assistant I screens calls and responds to or routes routine inquiries from external or internal sources with appropriate correspondence or other messaging. Schedules and coordinates meetings, travel, and other group activities. May manage expense reporting, invoicing, office supply inventory, or other routine processes. Requires a high school diploma. Typically reports to a supervisor or manager. The Administrative Assistant I works under the close direction of senior personnel in the functional area. Possesses a moderate understanding of general aspects of the job. May require 0-1 year of general work experience.
Administrative Assistant II - Average Salary $51,902
Administrative Assistant II provides administrative support to an individual, team, department or group in an organization. Collects, reviews and analyzes data and prepares reports, charts, budgets, and other presentation materials utilizing word processing, spreadsheet, or specialized software. Being an Administrative Assistant II prepares and distributes reports or other communications on a regular schedule. Maintains files, databases, and archives of relevant records. Additionally, Administrative Assistant II screens calls and responds to or routes routine inquiries from external or internal sources with appropriate correspondence or other messaging. Schedules and coordinates meetings, travel, and other group activities. May manage expense reporting, invoicing, office supply inventory, or other routine processes. Requires a high school diploma. Typically reports to a supervisor or manager. The Administrative Assistant II works under moderate supervision. Gaining or has attained full proficiency in a specific area of discipline. To be an Administrative Assistant II typically requires 1-3 years of related experience.
Administrative Assistant III - Average Salary $62,322
Administrative Assistant III provides administrative support to an individual, team, department or group in an organization. Collects, reviews and analyzes data and prepares reports, charts, budgets, and other presentation materials utilizing word processing, spreadsheet, or specialized software. Being an Administrative Assistant III prepares and distributes reports or other communications on a regular schedule. Maintains files, databases, and archives of relevant records. Additionally, Administrative Assistant III screens calls and responds to or routes routine inquiries from external or internal sources with appropriate correspondence or other messaging. Schedules and coordinates meetings, travel, and other group activities. May manage expense reporting, invoicing, office supply inventory, or other routine processes. Requires a high school diploma. Typically reports to a supervisor or manager. The Administrative Assistant III works independently within established procedures associated with the specific job function. Has gained proficiency in multiple competencies relevant to the job. To be an Administrative Assistant III typically requires 3-5 years of related experience.