Journal profile · Computer Science, Artificial Intelligence
Journal of Machine Learning Research
ISSN 1532-4435 · eISSN 1533-7928 · Microtome Publishing · UNITED STATES · Bimonthly · Founded 2001
Journal of Machine Learning Research: CAS Zone 4 · Computer Science (2025 upgraded edition); impact factor 6; fully open access; review about 2 months (community reports); community-reported acceptance: fairly hard; 1 articles in 2025; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
Journal of Machine Learning Research is published by Microtome Publishing and is in Zone 4 of Computer Science in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Neural Networks and Applications, Face and Expression Recognition and Machine Learning and Algorithms, together about 29.1% of its articles. Its main subfields are Artificial Intelligence. (generated from OpenAlex topic counts and CAS ranking data)
The Journal of Machine Learning Research (JMLR), established in 2000, provides an international forum for the electronic and paper publication of high-quality scholarly articles in all areas of machine learning.
From the journal's Aims & Scope
Research area (LetPub): Computer Science, Artificial Intelligence
Editor-in-chief Pradeep RavikumarPublisher website
Editorial board by country: 1 in mainland China (about 2%); most named United States 31, Canada 4, Japan 3, United Kingdom 2, Germany 2 (54 members with a country) Editorial board ↗Publisher website ·
Main research topics OpenAlex counts of recent articles; shares are approximate
- Neural Networks and ApplicationsComputer Science12.3%
- Face and Expression RecognitionComputer Science8.4%
- Machine Learning and AlgorithmsComputer Science8.3%
- Bayesian Modeling and Causal InferenceComputer Science6.8%
- Machine Learning and Data ClassificationComputer Science6.6%
- Statistical Methods and InferenceMathematics6.1%
- Sparse and Compressive Sensing TechniquesEngineering6.1%
- Bayesian Methods and Mixture ModelsComputer Science5.6%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Computer Science Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Computer Science | Zone 4 |
| Minor | Automation & Control Systems | Zone 4 |
| Minor | Computer Science, Artificial Intelligence | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Computer Science Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Computer Science | Zone 3 |
| Minor | Automation & Control Systems | Zone 3 |
| Minor | Computer Science, Artificial Intelligence | Zone 3 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Computer Science Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Computer Science | Zone 3 |
| Minor | Automation & Control Systems | Zone 3 |
| Minor | Computer Science, Artificial Intelligence | Zone 3 |
Top journal: noReview journal: no
Database indexing
SCIEScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Indexing the journal's website claims
ISSN 1533-7928, ISSN 1532-4435Publisher website
As the journal's website lists them, not checked against each database; for Web of Science editions the records above apply.
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 6LetPub ·
- CiteScore 2026-06
- 13.3LetPub ·
- SJR 2026-06
- 2LetPub ·
- SNIP 2026-06
- 3.36LetPub ·
- h-index
- 173LetPub ·
- h-index
- 126OpenAlex ·
- i10-index
- 592OpenAlex ·
- 2-year mean citedness
- 0OpenAlex ·
- Self-citation rate
- 1.5%LetPub ·
- Share of gold OA articles
- 0.19%LetPub ·
Volume
- Articles per year
- 294LetPub ·
- Articles per year (publisher)
- 2Publisher website ·
Articles by year OpenAlex count · 1,298 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2025 | 1 | 1 | 0 |
| 2024 | 3 | 3 | 0 |
| 2021 | 45 | 1 | 638 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
- Average review time (community reports)
- about 2 monthsLetPub ·
- Average acceptance (community reports)
- Fairly hardLetPub ·
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Fully open accessLetPub
Every article is open access; authors usually pay an article processing charge (APC).
No source has fee information yet; check the journal's website.
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Submission
Article types and submission policies (journal website)
Article types accepted1
- machine learning open source software paper(Machine Learning Open Source Software Paper)Length not stated
Policy excerpts from the journal's websiteAI use, Open access
- AI use UQLM: A Python Package for Uncertainty Quantification in Large Language Models
Dylan Bouchard, Mohit Singh Chauhan, David Skarbrevik, Ho-Kyeong Ra, Viren Bajaj, Zeya Ahmad, 2026. (Machine Learning Open Source Software Paper) [abs][pdf][bib] [code]
Source ↗Publisher website ·- Open access
All published papers are freely available online. Model summary
All published papers are freely available online.
Source ↗Publisher website ·
Excerpts are quoted from the journal's website; "model summary" lines are written by Workers AI and checked against the text. The journal's website is authoritative.
Profile
Publication details and official links
- Publisher
- Microtome Publishing
- Country or region
- UNITED STATES
- Language
- English
- Frequency
- Bimonthly
- Founded
- 2001
- ISSN
- 1532-4435
- Electronic ISSN
- 1533-7928
- Official links
- Journal homepage ↗OpenAlex
- Submission system ↗LetPub
- Special issues ↗Publisher website
FAQ
Frequently asked questions about Journal of Machine Learning Research
What CAS zone is Journal of Machine Learning Research in?
In the 2025 upgraded edition of the CAS Journal Ranking, Journal of Machine Learning Research is in Zone 4 of Computer Science, and in Zone 4 of the minor category Automation & Control Systems / Computer Science, Artificial Intelligence. In the 2026 Xinrui edition it is in Zone 3 of Computer Science. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of Journal of Machine Learning Research?
The latest impact factor listed by LetPub is 6; CiteScore 13.3, h-index 126.
How long does peer review take at Journal of Machine Learning Research?
Authors report an average review time of about 2 months; the community-reported acceptance is “Fairly hard”. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Where are the editorial board members of Journal of Machine Learning Research based?
Of the 54 board members whose country the journal's board page names, 1 (about 2%) are in mainland China; the countries named most often are United States (31), Canada (4) and Japan (3). Counted from the institutions listed on the board page; for reference only.
Which databases index Journal of Machine Learning Research?
According to LetPub and DOAJ records, Journal of Machine Learning Research is indexed in SCIE and Scopus.
Is Journal of Machine Learning Research open access, and what is the APC?
Journal of Machine Learning Research is a fully open-access journal. Fee information is not available yet; check the journal's website.
Sources and updates
The facts on this page come from LetPub, Publisher website, OpenAlex; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-25). Last updated: .