Dr. and Mrs. Mercer Carter Blanchard of Columbus, Ga. announce the engagement of their daughter, Belle Carter to Blake Tyler Newton III, the son of Mr. and Mrs. Newton Jr. of Washington, D.C. The engaged couple live in New York City.

Miss Blanchard, who is a graduate of Stratford College, Danville, Va., is publicity director of Fawcett Books Group, a unit of CBS Publications. Her father is a pediatrician. She is the granddaughter of the late Dr. and Mrs. Mercer Blanchard of Columbus and the late Mr. and Mrs. Robinson Cator Pagon of Baltimore, Md. Her paternal grandfather was also a pediatrician and her maternal grandfather was vice-president of Armstrong, Cator & Co. of Baltimore.

Mr. Newton is a member of the law firm of Hall, McNicol, Hamilton & Clark. A native of Richmond, he is a graduate of the Episcopal High School in Alexandria, Va., the College of William and Mary, and the University of Virginia Law School. His father is president of the American Council of Life Insurance in this city. Mr. Newton's grandparents are the late Virginia State Senator Blake T. Newton of Hague, and the late Mrs. Newton and the late Rt. Rev. John Moore Walker, Bishop of the Episcopal Diocese of Atlanta and the late Mrs. Walker.

The wedding is scheduled to take place in Columbus, Ga. in the spring.