Broad Creek is a tributary of the lower Susquehanna River located in Harford County, Maryland.

Broad Creek originates on the west side of Constitution Road about 500 feet south of the Pennsylvania state line.

In its three-mile course through Broad Creek Memorial Scout Reservation, it was dammed to create Lake Aaron Straus and passes close to the Late Archaic Period Broad Creek Soapstone Quarries archaeological site.

[2] Downstream from the 1948 Boy Scout dam, the creek forms a noteworthy gorge through the largest and oldest eastern hemlock grove in the state east of the Allegheny Front.

[3] At the east edge of the reservation, about two miles from its mouth, the creek meets the headwaters of the reservoir.