Sue Ramsey Johnston Ferguson (1897–1977) was a North Carolina political figure.

Ferguson graduated from Woman's College (now The University of North Carolina at Greensboro) in 1918. She later received a master's degree from Columbia University in New York. In 1934, she married Raymond S. Ferguson.

Ferguson served as a trustee of the University of North Carolina and as a member of the North Carolina State Board of Education. She served in the North Carolina Senate for the 28th district from 1947 to 1949. While in the Senate she proposed the creation of a committee to investigate the North Carolina state school system, leading to the formation of the State Education Commission.

She was a member of Delta Kappa Gamma.