On 17 April 1910, Wallis was confirmed at Christ Episcopal Church, Baltimore, and between 1912 and 1914 her uncle paid for her to attend Oldfields School, the most expensive girls' school in Maryland.
Pada tanggal 17 April 1910, Wallis dikonfirmasi di Gereja Episkopal Kristus, Baltimore, dan antara 1912 dan 1914 pamannya Warfield membayarkan sekolahnya untuk dapat bersekolah di Sekolah Oldfields, sekolah putri paling mahal di Maryland.