Jeff Speck is an American city planner, writer, and lecturer, well-known as the principal at the urban design and consultancy firm, Speck & Associates. Over his career, Speck has become a prominent figure in urban planning, with a focus on creating more livable and walkable cities.

He has made significant contributions to the field through his written work, most notably with his 2012 book, Walkable City: How Downtown Saves America, One Step at a Time. His expertise and advocacy have also been showcased in various TED Talks, where he speaks passionately about the principles of New Urbanism and the importance of walkability in urban environments.