The House of Graphs

Database of interesting graphs

Most graph theorists will agree that among the vast number of graphs that exist there are only a few that can be considered really interesting.

It is the aim of this House of Graphs project to find a workable definition of 'interesting' and provide a searchable database of graphs that conform to this definition. We also allow users to add additional graphs which they find interesting. In order to avoid abuse, only registered users can add new graphs.

Lists of graphs and generators

We would also like to serve as a repository for lists of graphs (which can be downloaded in several formats) and graph generators.

These lists of graphs and generators can be found in the graph meta-directory.

If you use House of Graphs in your research, you can cite it as:

G. Brinkmann, K. Coolsaet, J. Goedgebeur, H. Mélot, House of Graphs: a database of interesting graphs, Discrete Applied Mathematics, 161(1-2):311-314, 2013 (DOI). Available at

New House of Graphs website (beta)

The past year we have completely rebuilt the House of Graphs website using more modern frameworks as several of the frameworks used in the current House of Graphs were outdated and approaching an end of life status (note that we started developing HoG in 2010). We have also added several new features (e.g. the possibility to edit graph drawings and support for storing multiple drawings per graph) and several other updates which should improve the user experience.

The website is still under development, but we hope to release it soon. In the meantime you can already try the beta version of the new website at

We will migrate the entire database of the current House of Graphs to the new website when we launch the new website, so all graphs, comments, accounts, etc. will be preserved.