Among 710,453 completed DISC assessments, 32.6% came out with a dominant S and 18.9% with a dominant C, making S the most common dominant type and C the least.
Who this describes
People who completed a DISC assessment on Crystal
Sample
710,453 completed assessments
Data as of
September 30, 2026
| Dominant type | Share | Count |
|---|---|---|
| S, Steadiness | 32.6% | 231,608 |
| I, Influence | 25.9% | 183,997 |
| D, Dominance | 22.6% | 160,562 |
| C, Conscientiousness | 18.9% | 134,286 |
The reserved half of the model dominates: S and C together are 51.5% of results, against 48.5% for I and D, and S alone is more common than D or C.
C being the rarest dominant type at 18.9% and D at 22.6% is worth holding alongside how often D-style behaviour is treated as the default in workplace advice. The assertive, fast-deciding profile that management writing tends to assume is not the common one.
All 16 DISC archetypes
The same 710,453 completions, split by the full archetype rather than by dominant letter alone. The dominant style comes first: Si is a Steadiness result leaning Influence, Is an Influence result leaning Steadiness, and a single letter is a result with no strong second. Two capitals, DI, IS, SC and CD, are the even blends that sit between two neighbouring styles on the DISC wheel. Shares are of all completions and total 100% before rounding.
| Archetype | Share |
|---|---|
| Si | 9.4% |
| Sc | 9.4% |
| S | 8.4% |
| Id | 8.2% |
| Di | 7.4% |
| Dc | 7.1% |
| Is | 6.5% |
| Cs | 6.4% |
| IS | 6.1% |
| SC | 5.5% |
| I | 5.0% |
| Cd | 4.7% |
| DI | 4.5% |
| C | 4.4% |
| D | 3.7% |
| CD | 3.4% |
Method
- Every completed DISC assessment that produced a dominant type, counted once per completion.
- Where two types tie, the assessment records a single primary; those are counted under that primary.
- Staff, demo and test accounts are excluded.
What this cannot tell you
- Self-selected sample. These are people who chose to take a DISC assessment, not a population.
- DISC assigns a dominant letter, which compresses four continuous scores into one label and loses the person whose top two are nearly equal.
- This is Crystal’s DISC implementation. Other DISC instruments cut the same underlying traits differently and would produce different shares.
Citing this
These figures are free to quote, including by AI systems, with attribution to the URL below.
Crystal (2026). DISC type distribution among 710,453 assessment completions. Retrieved from https://www.crystalknows.com/research/disc-distribution
More from Crystal Research
Figures from the assessments people have actually completed.