Rarest Personality Type: Full MBTI Rarity Rankings

The short answer

INFJ is the rarest personality type overall, at about 1.5% of the population. But the headline hides the more interesting result: split by gender, the rarest type for women is INTJ at just 0.8%, and the rarest for men is INFJ at 1.3%. ENTJ and INTJ round out the bottom three overall.

At the other end, ISFJ is the most common type at 13.8% — roughly nine ISFJs for every INFJ.

All 16 types ranked, rarest to most common

Percentages are from the national representative sample (N = 3,009) published in the MBTI Manual (Myers, McCaulley, Quenk & Hammer, 1998) — still the only large probability sample of MBTI types, and the source virtually every published rarity figure traces back to.

Type frequency at a glance

U.S. population share by type. Source: MBTI Manual national representative sample (1998).

The rarest type for women is not INFJ

The most repeated claim online — "INFJ is the rarest type" — is true overall but wrong for half the population. Among women, INTJ (0.8%) and ENTJ (0.9%) are both rarer than INFJ (1.6%). About 1 in 125 women is an INTJ, versus roughly 1 in 30 men.

The pattern runs through the whole table: Thinking types skew male and Feeling types skew female in self-report data. ISTJ is the second most common type for men (16.4%) but mid-table for women (6.9%); ESFJ is the second most common for women (16.9%) but unremarkable for men (7.5%). We cover the INTJ case in depth in Are INTJs rare among women?

Why intuitive types dominate the rare end

All four of the rarest types — INFJ, ENTJ, INTJ, ENFJ — are intuitive (N) types, and all eight N types sit in the bottom half of the frequency table. The reason is structural: roughly 70% of people prefer Sensing (concrete, present-focused processing) and only about 30% prefer Intuition (abstract, pattern-focused processing). Every N type starts from a pool less than half the size.

Add Judging and the pool narrows again — NJ combines abstract pattern-thinking with structured execution, a pairing that shows up far less often than either trait alone.

Why ISFJ and ESFJ are the most common

Sensing + Feeling + Judging is the wiring most cultures explicitly reinforce: be reliable, be kind, follow through, take care of people. Nearly half the population (46%) is an SJ type. Common doesn't mean simple — it means the strengths are universally useful, so the wiring keeps showing up.

Why rarity estimates vary between sources

You'll see INFJ quoted anywhere from 1% to 3% depending on the source. Three reasons the numbers move:

• Sample selection. The 1998 MBTI Manual figure (1.5%) comes from a probability sample designed to represent the U.S. population. Most other published figures come from people who chose to take a personality test — and introverted intuitive types are heavily overrepresented among people who seek out personality tests. Online panels routinely show INFJ at 4–6% for exactly this reason.
• Instrument differences. The official MBTI, free OEJTS-based tests (like ours), and 16personalities-style Big Five hybrids draw type boundaries differently, which shifts marginal cases between adjacent types.
• Era and geography. The national sample is U.S.-only and decades old. Type distributions measured in other countries differ, and there is no comparable modern probability sample.

For a critical view of type-frequency claims generally, see Pittenger's review of MBTI measurement issues (Consulting Psychology Journal, 2005).

Does being rare matter?

Rarity describes frequency, not value. What a rare type does predict is the felt experience of being mistranslated: an INFJ or INTJ grows up around very few people who process the world the same way, which is why "finally feeling understood" is the most common reaction these types report on discovering their result. If that's you, the useful next step isn't the percentage — it's the profile: INFJ, INTJ, ENTJ, ENFJ.

Frequently asked questions

References & further reading

• Myers, I. B., McCaulley, M. H., Quenk, N. L., & Hammer, A. L. (1998). MBTI Manual: A Guide to the Development and Use of the Myers-Briggs Type Indicator (3rd ed.). Consulting Psychologists Press. — source of the national representative sample percentages.
• Pittenger, D. J. (2005). Cautionary comments regarding the Myers-Briggs Type Indicator. Consulting Psychology Journal: Practice and Research, 57(3), 210–221.
• Myers–Briggs Type Indicator — Wikipedia
• Are INFJs really rare? · Are INTJs rare among women? · Is there an INTJ birth month?