From Wikipedia, the free encyclopedia Allison Balson (born November 19, 1969) is an American actress, who is also a published singer and songwriter. Her best known role was Nancy Oleson on the Little House on the Prairie series which she held between 1981 and 1983. She graduated valedictorian from her high school and went on to receive a Bachelor's from Princeton University and a Master's from Trinity College, Dublin, Ireland. In 1987 Allison's song "I Wonder" was featured in the soundrack for ...