Mr. and Mrs. Robert D. H. Harvey of Baltimore announce the engagement of their daughter, Ellen Dixon, to Richard Spillenkothen of Washington D.C., son of Mrs. Roy Spillenkothen of St. Louis, Mo. and the late Mr. Spillenkothen.

Miss Harvey, who graduated from St. Timothy's School (Md.) and Princeton University, is completing her master's in economics at George Washington University. She is an economist with the Board of Governors of the Federal Reserve System in Washington, D.C., where Mr. Spillenkothen holds the position of supervisory financial analyst. He graduated in 1972 from Harvard University and has a master's in business administration from the University of Chicago.

Miss Harvey's father is Chairman of the Board of Maryland National Corporation and Chairman of the Board of Johns Hopkins University. Her mother is Chairman of the Board of Union Memorial Hospital. She is the granddaughter of Mrs. F. Barton Harvey of Baltimore and the late Mr. Harvey, and of the late Brig. Gen. (USA ret.) and Mrs. Henry M. Gross of Harrisburg, Pa.

Mr. Spillenkothen is the grandson of the late Mr. and Mrs. Charles Spillenkothen and the late Mr. and Mrs. William Pohlman of St. Louis.

A May wedding is planned.