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Library Assistant IV Salary in the United States

How much does a Library Assistant IV make in the United States?

As of August 01, 2026, the average salary for a Library Assistant IV in the United States is $61,218 per year, which breaks down to an hourly rate of $29.

However, a Library Assistant IV's salary can vary significantly. Here’s a look at the typical salary range:

  • Top Earners (90th percentile): $71,032
  • Majority Range (25th-75th percentile): $55,517 to $66,355
  • Entry-Level (10th percentile): $50,327
Salary Factors Salary-Boosting Skills Salary by Experience Related Job Salaries Top Paying Cities Explore Related Jobs

Key Factors That Influence Library Assistant IV Salaries

A Library Assistant IV's salary isn't a fixed number. It's shaped by several important factors. Below, we'll explore how your years of experience, geographic location and company size can directly affect your earning potential.

How Experience Level Affects Library Assistant IV Salaries?

Experience is a primary driver of a Library Assistant IV's salary. As you build your skills and take on more complex tasks, your compensation generally increases. Here's how the average salary grows at different career stages:

  • Library Assistant II (1-3 years): $42,520
  • Library Assistant III (3-5 years): $54,855
  • Library Assistant IV (5-7 years): $61,218
  • Library Services Supervisor (7+ years): $88,580
  • Library Services Manager (7+ years): $102,792
Job Role Years of Experience Average Salary
Library Assistant II1-3 years$42,520
Library Assistant III3-5 years$54,855
Library Assistant IV5-7 years$61,218
Library Services Supervisor7+ years$88,580
Library Services Manager7+ years$102,792
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How Do Library Assistant IVs Salaries Vary from State to State?

Your salary can change significantly depending on where you work. States with a higher cost of living and strong industrial sectors often pay more to attract Library Assistant IVs. For example, consider the average annual salaries in these key locations:
  • District of Columbia: $67,781.
  • California: $67,523.
  • Massachusetts: $66,624.

Top Paying Cities for Library Assistant IV

Salaries can also vary between different cities. Major metropolitan areas or cities with a high demand for technicians often offer more competitive pay. Here are a few examples of average annual salaries in different U.S. cities:

  • San Jose: $77,214
  • San Francisco: $76,369
  • Oakland: $74,759

Library Assistant IV Salary by Company Size: Startups vs. Enterprise

Library Assistant IV salary potential scales significantly with company size. Data shows that Enterprise companies (5,000+ employees) pay the highest average salary at around $68,530. While startup companies pay approximate $57,975.

Library Assistant IV Salary by Company Size

Company Size Employees Average Salary
Startup 1~50 $57,975
Growth Stage 51~500 $61,315
Established 501~5000 $66,178
Enterprise 5000+ $68,530

Library Assistant IV Salary by Industry: Top Paying Sectors

For Library Assistant IV roles, the industry you choose can affect earning potential by as much as 92% (the gap between the highest and lowest paying industries). Data shows that the Internet and Software & Networking sectors offer the strongest compensation, at 40% above the average. In contrast, Library Assistant positions in Transportation or Hospitality & Leisure typically offer lower base pay, as these industries often view Library Assistant IV as a support function rather than a direct revenue driver.

The top paying industries for a Library Assistant IV

Industry Sector Average Annual Salary Average Hourly Rate Pay vs.Avg
Internet$85,705$41.040%
Software & Networking$82,644$40.035%
Financial Services$79,583$38.030%
Biotechnology$76,522$37.025%
Pharmaceuticals$73,462$35.020%

Library Assistant IV Salary: Hourly Rate, Weekly Pay, and Monthly Pay

Understanding how a Library Assistant IV's annual salary breaks down can help with budgeting. Below, you can see the average hourly rate, weekly pay, and monthly pay for this role. Use the buttons to switch between different pay periods.

Last Updated on August 01, 2026
$55,517
Average $61,218/year
$66,355
$4,626
Average $5,102/month
$5,530
$1,068
Average $1,177/week
$1,276
$27
Average $29/hour
$32
Annual Salary Monthly Pay Weekly Pay Hourly Wage
75th Percentile $66,355 $5,530 $1,276 $32
Average $61,218 $5,102 $1,177 $29
25th Percentile $55,517 $4,626 $1,068 $27

Library Assistant IV Salary Growth & Career Path

Library Assistant IV

Next Role

Advancement

Promotions are the fastest way to increase your earnings. As a Library Assistant IV, you have the following paths for advancement. The table below compares the salary raises for common next-step roles. By comparing these figures, you can choose the career path that best meets your financial goals.

Next Step Role Estimate Salary Projected Raise
Library Services Supervisor $88,580 45%
Medical Library Services Manager $94,494 54%
Library Technical Services Manager $129,824 112%

Most common benefits for Library Assistant IV

  • Social Security
  • 401 (k)
  • Disability
  • Healthcare
  • Pension
  • Time Off (days)

Common company salaries for Library Assistant IV

Here are companies hiring for Library Assistant IV and their salaries, click below for more details.

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FAQ about Library Assistant IV

1. Where can a Library Assistant IV earn the most?

A Library Assistant IV's earning potential can vary widely depending on several factors, including location, industry, experience, education, and the specific employer. According to the latest salary data by Salary.com, a Library Assistant IV earns the most in San Jose, CA, where the annual salary of a Library Assistant IV is $77,214.

2. What is the highest pay for Library Assistant IV?

The highest pay for Library Assistant IV is $71,032.

3. What is the lowest pay for Library Assistant IV?

The lowest pay for Library Assistant IV is $50,327.

4. What are the responsibilities of Library Assistant IV?

Supports library circulation and processing operations and assists library users in locating materials and using library systems and tools. Reshelves returned books and materials and updates the library information system. Maintains user account and access data and processes special requests for materials. Performs routine cataloging processes. Assists with maintenance and update processes for library databases, software, and systems. May perform clerical tasks related to book purchasing and payments. Requires a high school diploma. Typically reports to a supervisor. Independently performs a wide range of complex duties under general guidance from supervisors. Has gained full proficiency in a broad range of activities related to the job. Typically requires 5-7 years of related experience.

5. What industry pays the highest salary for Library Assistant IV?

The Internet industry offers the highest average compensation for Library Assistant IV roles, with salaries approximately 40% above the market median.

Where Does Our Salary Data Come From?

Salary.com provides salary estimates, histograms, trends, and comparisons using data from employer job postings and third-party sources.

We offer detailed salary information across multiple percentiles for your reference. (Click here to learn Why the Salary Midpoint Formula Is Crucial for Achieving Pay Equity.)

With the most extensive online, real-time compensation data available, Salary.com helps you pinpoint your exact pay target.

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