How many employees work at Aon?
Aon Plc (AON) has approximately 66,652 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. Aon's total headcount has grown 16.0% from 57,455 employees in 2023 to 66,652 in 2026.
Data source: Revelio LabsCoverage: Global workforce, 2023–2026Published July 2026
Is Aon hiring right now?
Yes, Aon is actively hiring. Aon had 4,444 active job postings in 2026, a 5.5% increase from 2025 — see job openings & hiring trends.
About Aon's Workforce
Aon Plc (AON) is a Financial Services company that employs 66,652 people worldwide as of March 2026. It is the largest by headcount among its peers. Founded in 1982, the company is headquartered in Dublin, Ireland and trades on the New York Stock Exchange.
Aon's workforce has grown 16.0% from 2023 to 2026, up 8.3% year over year in 2026. Its workforce is concentrated most in the United States (28.1%), followed by India (17.6%) and the United Kingdom (8.7%), with Italy, its fastest-growing location.
Aon's largest functional groups are Finance and Operations (50.9%), Engineering (28.5%), and Sales and Marketing (20.5%), with Finance and Operations growing fastest (up 6.0%). Median employee tenure is 4.6 years. The average salary is $68,212, ranging from a median of $93,000 in Northern America to $8,000 in Southern Asia.
Aon's active job postings rose 5.5% in 2026 to 4,444, with new postings per month cooling from 4,057 in 2023 to 2,833 in 2026. Overall employee sentiment is neutral but improving.
Sourced from Revelio Labs workforce data.
As of March 2026
Aon
workforce metrics
Headcount
66.7k
8.3% YoY
Avg. Salary
$68.2k
3.8% YoY
Tenure
4.6yr
0.6yr YoY
Growth Rate
8.3%
3.0pts YoY
Hiring Rate
Attrition Rate
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Aon. Compare to peers, export the dataset, and access the full quarterly history.
- Aon had 66,652 employees in 2026, a 8.3% increase (+5,305) from 2025.
- Aon had 64,819 employees in 2025, a 6.9% increase (+4,331) from 2024.
- Aon had 60,488 employees in 2024, a 4.5% increase (+2,689) from 2023.
- Aon had 57,799 employees in 2023, a 2.8% increase (+1,573) from 2022.
Aon's total workforce has grown from 57,455 employees in 2023 to 66,652 in 2026.
Aon Plc — quarterly employee count (2023–2026)
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 66,652 | +5,305 | +8.3% |
| 2025 | Q4 | 64,819 | +4,331 | +6.9% |
| 2025 | Q3 | 63,464 | +3,861 | +6.3% |
| 2025 | Q2 | 62,435 | +3,414 | +5.6% |
| 2025 | Q1 | 61,347 | +3,171 | +5.3% |
| 2024 | Q4 | 60,488 | +2,689 | +4.5% |
| 2024 | Q3 | 59,603 | +1,980 | +3.4% |
| 2024 | Q2 | 59,021 | +1,566 | +2.7% |
| 2024 | Q1 | 58,176 | +1,429 | +2.5% |
| 2023 | Q4 | 57,799 | +1,573 | +2.8% |
| 2023 | Q3 | 57,623 | +1,876 | +3.3% |
| 2023 | Q2 | 57,455 | +2,449 | +4.4% |
Want to see Aon's complete headcount history back to 2008, including quarterly breakdowns?
The United States accounts for the largest share of Aon's global workforce with approximately 28% of total employees, followed by India and the United Kingdom. Aon's headcount in Italy is growing fastest among its major locations, up 14.4% year over year in 2026.
Aon employees by country — 2026
| Country | Employees | % of Total | YoY % |
|---|---|---|---|
| United States | 19,084 | 28.1% | +1.3% |
| India | 11,958 | 17.6% | +7.2% |
| United Kingdom | 5,907 | 8.7% | +5.8% |
| Canada | 2,937 | 4.3% | +1.3% |
| Australia | 1,452 | 2.1% | +1.3% |
| Italy | 1,352 | 2.0% | +14.4% |
| Poland | 1,349 | 2.0% | +14.4% |
| Brazil | 1,249 | 1.8% | +9.8% |
| Netherlands | 1,075 | 1.6% | +9.9% |
| Germany | 1,049 | 1.5% | +18.2% |
Drill into city-level data, hiring trends by region and historic geographic shifts
Aon's largest employee groups are Finance and Operations (50.9%), Engineering (28.5%), and Sales and Marketing (20.5%).
Aon employees by department — 2026
| Department | Employees | % of Total | YoY % |
|---|---|---|---|
| Finance and Operations | 34,630 | 50.9% | +6.0% |
| Engineering | 19,413 | 28.5% | +5.5% |
| Sales and Marketing | 13,977 | 20.5% | +4.4% |
Compare Aon's department mix to industry peers.
Aon's average employee salary is $68,212 globally. Employees in Northern America receive the highest compensation, with median pay approximately 1.4x the global average. Pay is lowest in Southern Asia, at a median of $8,000.
Aon median employee salary by region — 2026 (USD)
| Region | Median Salary |
|---|---|
| Northern America | $93,000 |
| Northern Europe | $78,000 |
| Pacific Islands | $72,000 |
| Western Europe | $71,000 |
| Eastern Asia | $50,000 |
| Southern Europe | $44,000 |
| Arab States | $35,000 |
| Eastern Europe | $30,000 |
| Central America and the Caribbean | $24,000 |
| Central and Western Asia | $19,000 |
| South-Eastern Asia | $18,000 |
| Southern America | $16,000 |
| Sub-Saharan Africa | $10,000 |
| Northern Africa | $8,000 |
| Southern Asia | $8,000 |
Unlock salary by role, level, and city — and compare to Aon's industry peers.
- Aon had 4,444 active job postings in 2026, a 5.5% increase (+419) from 2025.
- Aon had 4,025 active job postings in 2025, a 14.7% decline (-640) from 2024.
- Aon had 4,665 active job postings in 2024, a 21.9% decline (-1,147) from 2023.
- Aon had 5,812 active job postings in 2023, a 23.4% increase from 2022.
- Hiring velocity in 2026: 2,833 new roles/month, down from 3,452 in 2025 and 3,527 in 2024. New metric
Aon's active job postings rose 5.5% in 2026 to 4,444, with new postings per month cooling from 4,057 in 2023 to 2,833 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Revelio Labs tracks employee sentiment across Aon's workforce based on public professional data. Overall sentiment is neutral and has improved year over year in 2026.
Overall
Unlock the full sentiment breakdown by department, tenure, and trend over time.
Similar Financial Services Companies by Employee Count
- How fast is Aon growing?
- In 2026, Aon's headcount grew 8.3% to 66,652 employees, up from 61,347 in 2025.
- Where are Aon employees located?
- Most Aon employees are based in the United States (28.1% of headcount), followed by India and the United Kingdom.
- What is the average salary at Aon?
- The average employee salary at Aon is approximately $68.2k per year.
- How many people does Aon hire per year?
- In 2026, Aon opened roughly 33,996 new roles — about 2,833 per month.
- When was Aon founded and where is it headquartered?
- Aon was founded in 1982 and is headquartered in Dublin, Ireland.
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