Nancy Ruth Landry (born June 1962) is a family practice lawyer from Lafayette, Louisiana, who is a Republican member of the Louisiana House of Representatives for District 31 (Lafayette and Vermilion parishes). She won the seat in a special election in 2008 upon the resignation of Republican Donald Trahan. In the 2007 nonpartisan blanket primary, Landry had come within thirty-three votes of defeating Trajan.