Region
Delaware
1,750
Pennsylvania
819
Delaware County (Pa.)
430
Delaware County
244
New Jersey
197
United States
193
Philadelphia
182
New Castle County (Del.)
174
New Castle County
151
Sussex County (Del.)
144
Delaware River Valley (N.Y.-Del. and N.J.)
141
Maryland
134
Wilmington
130
Kent County (Del.)
117
Sussex County
114
Delaware River (N.Y.-Del. and N.J.)
99
Kent County
91
Penn
86
Delaware River
75
Delaware Co
70
Philadelphia (Pa.)
65
Wilmington (Del.)
56
New Castle Co
55
Chester County (Pa.)
45
New Sweden
43
Philadelphia Metropolitan Area
35
Chester
34
Chester (Pa.)
34
Chester County
31
Delaware and Raritan Canal (N.J.)
29
Montgomery County (Pa.)
28
New Castle
26
Virginia
23
Delaware Valley
22
Delaware Water Gap
22
New York (State)
22
Chesapeake and Delaware Canal (Del. and Md.)
21
Delaware River Estuary
20
Camden
19
Delaware River Valley
19
Delaware River Watershed (N.Y.-Del. and N.J.)
18
Kent Co
18
Middle Atlantic States
17
Bucks County (Pa.)
16
New Castle (Del.)
16
Dover
15
Massachusetts
15
Montgomery County
15
Upper Darby
15
Darby (Pa.)
14
more ...