Nancy Brown may refer to:

• Nancy J. Brown, American physician-scientist
• Nancy Elizabeth Brown (born 1952), US Navy admiral
• Nancy Brown (actress) (1909–2003), Australian actress, singer and songwriter
• Nancy Brown (columnist) (1870–1948), American advice columnist
• Nancy Brown (Kansas politician) (1942–2020), American state legislator from Kansas
• Nancy Marie Brown (born 1959), American author
• Nancy Brown (musical), Broadway musical
• Nancy Brown (song), a popular song performed by Marie Cahill in the 1902 musical The Wild Rose

• Nancy Browne (1913–1996), New Zealand cricketer