Lewis Ledyard Weld (May 13, 1833 - January 10, 1865) was an American lawyer, politician, and Union Army officer.

Weld, the third son of Lewis Weld, was born in Hartford, Connecticut, May 13, 1833.

He graduated from Yale College in 1854. After two years spent in teaching, he pursued the study of law in Cleveland, Ohio and New York City,