Brainerd Kellogg (August 15, 1834 January 9, 1920) was born in Champlain, New York. He was a Tutor (1860 1861) and Professor of Rhetoric and English Literature (1861 1868) at Middlebury College in Vermont, United States. From 1868 to 1907, he served as a professor at the Brooklyn Polytechnic Institute.

Kellogg published a number of influential education books, which remain available to the public through resources like Project Gutenberg. He is most prominently recognized as the author of Rhetoric; History of the English Language. In collaboration with Alonzo Reed, he co-authored Graded Lessons in English; Higher Lessons in English; A One Book Course. Additionally, he authored a variety of textbooks on English writing and literature, including a series that focused on the works of William Shakespeare.

His contributions to educational methods include the Reed-Kellogg sentence diagram, a system first introduced in the book Higher Lessons in English, first published in 1877. This method of sentence diagramming in pedagogy has been based on their work, although it has been updated to reflect contemporary understanding of grammar. Reed and Kellogg's work was likely informed by W. S. Clark, who proposed his "balloon" method of depicting grammar in his 1847 book A Practical Grammar: In Which Words, Phrases & Sentences are Classified According to Their Offices and Their Various Relationships to Each Another.