Lu Ronghuan (simplified Chinese: 吕荣寰; traditional Chinese: 呂榮寰; pinyin: Lǚ Rónghuán; Hepburn: Ryo Eikan; 1890–1946), was a politician in the early Republic of China who subsequently served in a number of Cabinet posts of the Empire of Manchukuo.

A native of Fushun Liaoning Province, Lü studied law at the Jiangsu Provincial University, returning to Shenyang in Manchuria to establish a legal office.

In 1923, Lü was commissioned by the Fengtian clique warlord, Zhang Zuolin as a special envoy to Moscow, where he negotiated a treaty between Manchuria and the Soviet Union.

After the Mukden Incident of 1931, Lü was recruited by Japanese spymaster Colonel Kenji Doihara to serve on the Self-Government Guiding Board, to determine the future structure of the new State of Manchukuo.

In March 1935, Lü accepted the cabinet-level post of Minister of Civil Affairs of the Empire of Manchukuo, which he held to May 1937.