Lawrence Brock (August 16, 1906 – August 28, 1968) was a Nebraska Democratic politician. Brock was born near Columbus, Nebraska. He graduated from and then the College of Pharmacy of the University of Nebraska-Lincoln in 1929. He became a pharmacist in Madison, Nebraska. He then became a cattle feeder and farmer and the president of Nebraska Livestock Feeders Association, Cornbelt Livestock Feeders Association, and Northeast Nebraska Rural Electric Association.