ISTJ Personality Type

The Investigator Type

16 Personalities
Big Five
Free Personality Test


What is the ISTJ personality type (The Investigator)?
People with an ISTJ personality type tend to be reserved, orderly, and practical in their behavior. They are self-sufficient and work hard to meet their obligations. They prefer to be alone or in small groups of close friends and may be quiet and reserved in large group settings.

ISTJ Personality Traits

Introverted ISTJ types process the world internally. They tend to feel drained after social events and need time alone to recharge.

Highly pragmatic, they tend to focus more on the details, rather than the bigger picture. They make decisions based on what they see and know right now.

Investigators prioritize logical thinking and are more concerned with facts than emotion. They believe the truth is more important than people’s feelings.

They are very structured and organized, preferring to plan ahead and follow rules and processes. They are disciplined and have a strong work ethic.


In summary, ISTJ personality types tend to...

  • Seek time alone or in small groups of friends.
  • Focus on specifics and details over the big picture.
  • Prioritize logic and fact over emotion.
  • Create and abide by schedules, rules, and processes.
  • Make decisions based on the here-and-now.

ISTJ Meaning

  • (I) INTROVERSION: Introverts tend to draw energy from spending time alone.
  • (S) SENSING: Sensing types usually prefer to experience new things and focus on the reality of the situation.
  • (T) THINKING: Thinking types tend to follow their head and consider facts when making decisions.
  • (J) JUDGING: Judging types tend to be very structured and organized.

16-Personality is a personality framework that can help you understand other people and why they behave in certain ways.
Explore the 16 personality types here:

ISTJ Slide Show

Click through the slides below to learn more about ISTJs:

Or watch the video:

Related Personality Types

Below are the DISC and Enneagram types that are similar to 16-Personality Type ISTJ. 

DISC Type Cs, C, Cd, or CD

Enneagram Type 1, 5, or 6

You can find your DISC, Enneagram, and 16-Personality types by taking Crystal's free personality test.

Are you an ISTJ? Take the 16-Personality test to see

Complete the 16-Personality test below to find your 16-Personality type