In the mathematical field of graph theory, the Wong graph is a 5-regular undirected graph with 30 vertices and 75 edges.. It is one of the four (5,5)-cage graphs, the others being the Foster cage, the Meringer graph, and the Robertson–Wegner graph.

Like the unrelated Harries–Wong graph, it is named after Pak-Ken Wong.Wong, P. K. "Cages--A Survey." J. Graph Th. 6, 1-22, 1982.

It has chromatic number 4, diameter 3, and is 5-vertex-connected.

Algebraic properties The characteristic polynomial of the Wong graph is

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