Charles S. Johnson. He is notable; has his own Wikipedia articles. The organisation that confers it is notable; the Southern Sociological Society has its own Wikipedia article.
The awardees, well that is a problem because there is only a partial list of people who received the award. There are many gaps in the list and sources are available to indicate why they think someone received the award.
The Wikimedia blog has a post that mentions Lillian Smith. It mentions that she gave an acceptance speech at Fisk University in 1966. But there is no source for it. This does not mean that she did not receive the award, it just means that there is no source in the article.
When sources are provided to the Sociological Society, Mrs Smith will be connected to a list of other remarkable people. All notable in their own way. It is just a matter of connecting the dots.