Blanco Ditch is a long 1st order tributary to Sewell Branch in Kent County, Delaware.
Blanco Ditch rises on the Jordan Branch divide about 0.5 miles east of Pearsons Grove, Delaware.
Blanco Ditch drains of area, receives about 44.7 in/year of precipitation, has a topographic wetness index of 650.47 and is about 3.9% forested.