Alice Marguerite Pegler (21 July 1861 – 17 June 1929) was a South African teacher and botanical collector.

The daughter of S. Mackin Pegler, Alice was educated at the Dominican Convent in King William's Town.

Her collecting led to a regular correspondence with botanists such as Peter MacOwan, Harry Bolus, HHW Pearson, Selmar Schonland and Illtyd Buller Pole-Evans.

2 of his Orchids of South Africa (1911) and described her as someone "who, in spite of delicate health, has been indefatigable in exploring the flora of her neighbourhood."

Her specimens which numbered 2 000 were donated to the South African National Botanical Institute in Pretoria.