Is one of Laura Ingalls Wilder houses still standing?

Answer 1

No, but some were rebuilt,

There are two homes of Laura's still standing, both in Mansfield, MO. One is called Rocky Ridge and the other is the Stone House. Both can be toured.

Answer 2

Yes, one of Laura Ingalls Wilder's houses, often referred to as the "Little House on the Prairie," is still standing. It is located in Mansfield, Missouri, and is open to visitors as a historic site.