Cattail Branch is a long third-order tributary to Saulsbury Creek in Kent County, Delaware.
According to the Geographic Names Information System, it has also been known historically as:
Cattail Branch rises on the Green Branch divide about 1-mile west-northwest of Layton Corners, Delaware, and then flows generally south to join Saulsbury Creek about 0.5 miles north of Adamsville, Delaware.
Cattail Branch drains of area, receives about 44.7 in/year of precipitation, and is about 5.83% forested.