Grace Pearl Ingalls Dow (May 23, 1877, Burr Oak, Iowa, USA – November 10, 1941) was the fifth and last child of Caroline and Charles Ingalls. She was the youngest sister of Laura Ingalls Wilder, known for her Little House on the Prairie books.
Dow trained as a schoolteacher, and taught in the former town of Manchester, South Dakota, seven miles west of her own De Smet, South Dakota. (Manchester was obliterated by an F4 tornado on June 24, 2003, and was not rebuilt.) On October 16, 1901, she married Nathan William Dow in the parlor of her parents' home in De Smet. The couple had no children.
Aside from being a farm wife, she dabbled in journalism like her older sister Carrie, acting as a stringer for several local newspapers later in her life. After her parents' deaths, she took care of her eldest sister Mary, who was blind.
Dow died of complications from diabetes in Manchester, South Dakota on November 10, 1941, aged 64. Diabetes ran in the Ingalls family and Laura, Carrie, and Grace all eventually died from complications of the disease. Dow was the first of the Ingalls siblings to succumb to the ailment. She was buried at De Smet Cemetery.