The watershed of Core Creek is approximately 9.77 square miles (25.3 km2), part of the Delaware River watershed, and meets at the Neshaminy Creek's 14.30 river mile.

[2] An old document in the Library of the Bucks County Historical Society at one time dated "the 3 day of ye 7th month of 1696," the report of a jury appointed by the Court of Bucks County to lay out "a road (viz a cart road) from new towne [Newtown] to ye ferry at Gilbert Wheeler's."

[3] Core Creek rises in the northwestern portion of Lower Makefield Township, oriented east, then southeast, then is oriented southwest for some distance, passing into Middletown Township until it passes through Core Creek Park as it passes through Lake Luxembourg, created in 1975.

After the lake, it continues southwest until it meets with the Neshaminy Creek.

[4] Core creek lies within the Stockton Formation, a bedrock of sandstone, arkosic sandstone, shale, siltstone, and mudstone deposited during the Triassic.