Jeff Speck is an American city planner, writer, and lecturer who is the principal at the urban design and consultancy firm, Speck & Associates. He has authored or co-authored several books on urban planning, including his 2012 book, Walkable City: How Downtown Saves America, One Step at a Time. He is an advocate for New Urbanism and more "walkable" cities and has given TED Talks on the subjects.