Movielens

Overview

Dataset name: Movielens
Latest version: 1m
Available versions: 100k, 1m, 20m
Source: https://grouplens.org/datasets/movielens/

The MovieLens datasets are a collection of movie ratings data collected by the GroupLens Research project at the University of Minnesota.

Citation

@article{DBLP:journals/tiis/HarperK16,
author       = {F. Maxwell Harper and
                Joseph A. Konstan},
title        = {The MovieLens Datasets: History and Context},
journal      = {{ACM} Trans. Interact. Intell. Syst.},
volume       = {5},
number       = {4},
pages        = {19:1--19:19},
year         = {2016}
}

Version: 20m

Data Sources

Name	Source type	Archive	URL	Checksum
ml20m_zip	HttpSource	zip	https://files.grouplens.org/datasets/movielens/ml-20m.zip	md5:cd245b17a1ae2cc31bb14903e1204af3

Resources

ratings

Type: interactions
Format: transactions_tabular
Required: yes
Source: ml20m_zip
Filename: ratings.csv

Schema

sep: ','
user_col: userId
item_col: movieId
rating_col: rating
timestamp_col: timestamp
header: 0

genome_scores

Type: content
Source: ml20m_zip
Filename: genome_scores.csv
About: items

genome_tags

Type: content
Source: ml20m_zip
Filename: genome_tags.csv
About: items

links

Type: content
Source: ml20m_zip
Filename: links.csv
About: items

movies

Type: content
Source: ml20m_zip
Filename: movies.csv
About: users

Dataset Characteristics

Computed at: 2025-12-15

Metric	Value
n_users	138493
n_items	26744
n_interactions	20000263
space_size	60.8593196807194
space_size_log	1.784327093264329
shape	5.178469937182172
shape_log	0.7142014593596334
density	0.0053998478135544505
density_log	-2.267618479929789
gini_item	0.902942497565131
gini_user	0.5807014936671218
ratings_per_user	144.4135299257002
ratings_per_item	747.8411232425965

License & Usage

Please refer to the official dataset page for licensing and usage restrictions. https://grouplens.org/datasets/movielens/