Wilmer Worthington MacElree (December 17, 1859 – January 16, 1960) was an American lawyer and author of Along the Western Brandywine and other books on the history and natural environment of Chester County, Pennsylvania.

[6] A member of the Republican Party,[1] MacElree ran for judge of the Pennsylvania Courts of Common Pleas but lost the election in a landslide to two-term incumbent Joseph Hemphill in 1909.

[7] An enthusiastic amateur historian, MacElree lectured widely and published privately at least four books and many "sentimental" sketches and essays about the events, people, landmarks, and natural environment of Chester County.

[1] Their son, James Paul MacElree, attended the University of Pennsylvania, joined his father's law firm in 1908, and served as presiding judge of the Chester County Orphan's Court.

"[11] Side Lights on the Bench and Bar of Chester County (1918) received praise from historian Charles William Heathcote, who declared that MacElree had "contributed materially to legal history" and observed that the book showed evidence of "a careful study of court records and an intimate knowledge of the characters of leading lawyers and judges from the organization of the court to the early years of the present century.