Oldfields School is a college preparatory school for girls in grades 8 through 12 in Sparks Glencoe, Maryland. It was founded in Baltimore County, Maryland in 1867 by Anna Austen McCulloch and is the oldest girls' boarding school in Maryland. Oldfield's School has approximately 180 boarding and day students. Among the school's notable graduates was Wallis Warfield Simpson, who became the Duchess of Windsor.