Henry Lahiff (April 24, 1868 - February 7, 1954) was an Irish-American civil engineer active in California in the late 19th and early 20th centuries. Lahiff was born in Gort, Galway, Ireland and emigrated to the United States in 1888, taking citizenship in 1902. He initially settled in Brisbee, Arizona, where he found work with a mining company. Soon after he relocated to Placerville, where he found employment as the U.S. Deputy Mineral Surveyor. He died in Sacramento in 1954.