Straight and narrow or strait and narrow may refer to:

strait is the gate, and narrow is the way, which leadeth unto life, a phrase from Matthew 7:14
"Straight and Narrow" (The Outer Limits), a television episode
The Straight and Narrow, a 1918 film starring Oliver Hardy
"Walk the Straight and Narrow", an episode of Batman
the strait and narrow path described in the tree of life vision in the Book of Mormon