Willow Spring (or Willow Springs) is an unincorporated community in southeastern Wake County, and western Johnston County North Carolina, United States. As of 2007, the population was 212. The Frank and Mary Smith House and Turner and Amelia Smith House, both listed on the National Register of Historic Places, are located in Willow Spring. There is only one natural spring in Willow Spring, which is why it is called Willow Spring instead of Willow Springs. Black Creek, part of the Neuse River, runs through Willow Spring.