Eugene Hermann Plumacher (March 7, 1838 – September 25, 1910) was a German-American diplomat, who served as U.S. consul to Maracaibo, Venezuela, from 1877 until 1890.

Eugene Hermann Plumacher was born in Elberfeld in the Kingdom of Prussia, on March 7, 1838.

[2] The family later emigrated to the U.S. where he helped establish the Swiss colony of Beersheba Springs, Tennessee.

[4] Plumacher later survived a bout of yellow fever and relayed reports on upheavals and conflicts in Maracaibo, which is now part of Venezuela.

[8][9] Plumacher retired from his consul position in 1910 and died in Washington, D.C., on September 25 of the same year.