Journaling statistics answer different questions: how often people write, how diary writers describe their lives, and what happens in a controlled writing study. Keeping those questions separate makes the numbers more useful and stops a survey result from becoming an unsupported health promise.
In this article
How many people keep a journal?
There is no single worldwide journaling rate. In a YouGov poll of 5,735 U.S. adults on September 9, 2022, 11% said they wrote personal thoughts in a diary or journal very often and 17% said sometimes. Together, that is 28% reporting at least occasional writing in this particular poll. These are historical survey responses, not current global usage figures.
YouGov, September 9, 2022. All categories share a 0–100% scale. This poll does not measure the effects of journaling.
Diary writing and enjoyment of writing
The National Literacy Trust reported that 29.7% of children and young people aged 5–18 in its 2022 survey kept a diary. In its writing-engagement findings, diary writers were more likely to say they enjoyed writing: 51.1%, compared with 25.9% among non-diary writers.
Read the report and age-group details. This is an association. People who already enjoy writing may also be more likely to keep a diary.
How is this different from a writing experiment?
Asks people how often they write.
Describes reported behavior in that sample.
Compares writers and non-writers.
Finds associations, with possible alternative explanations.
Assigns a writing task and a comparison condition.
Tests a particular intervention, in a particular setting.
Sample size matters, but it cannot turn one design into another. A large poll can describe reported habits without showing that starting a journal causes an improvement. A small experiment can test a specific question while leaving uncertainty about other people or settings.
What do expressive-writing studies tell us?
Some research uses the Pennebaker expressive-writing approach: writing thoughts and feelings about a significant experience over several sessions. That differs from adding a photo caption or making a task list. Read the instructions used in a study before assuming that it tested your own writing routine.
Our mental health research explainer examines a review of 20 trials and explains why changes in questionnaire scores are not percentages of people cured. Our bedtime-writing article examines a narrower experiment comparing two kinds of list before one laboratory night.
Read a statistic in five questions
- Who took part? Country, age, recruitment and health context matter.
- What did they do? “Journaling” can refer to very different tasks.
- What was the comparison? No activity, another writing task and professional care are different baselines.
- What was measured? A self-reported feeling, a questionnaire score and a clinical outcome are not interchangeable.
- How uncertain is the result? Look for ranges, follow-up duration and limitations, not just a headline number.
What should you measure in your own journal?
Start with a reason to keep the record. If you want to remember ordinary life, an entry you can return to may be enough. If you want to notice a pattern, add a little context beside a mood or activity: the conversation, journey or change of plans that shaped the day.
A personal record can reveal questions worth exploring without proving a cause. Feeling better on days you write may reflect sleep, workload, company or having more time. You do not need to score every day or demonstrate a health effect to value what you have saved.
Sources and research notes
- YouGov (2022): U.S. adults’ diary and journal frequency
- National Literacy Trust (2022): children and young people’s diary writing
Sources checked September 22, 2026. Charts are original presentations of the cited historical data. Examples and the evidence-reading guide are editorial explanations, not a clinical evaluation of memoir.