| Name
|
Order downstream
|
State
|
Location
|
| unnamed island
|
1
|
Maryland
|
?
|
| Okonoko Island
|
2
|
Maryland
|
?
|
| unnamed islands
|
3
|
Maryland
|
?
|
| unnamed island
|
4
|
Maryland
|
?
|
| unnamed island
|
5
|
Maryland
|
?
|
| unnamed island
|
6
|
Maryland
|
?
|
| unnamed island
|
7
|
Maryland
|
?
|
| Hancock Island
|
8
|
Maryland
|
?
|
| unnamed island
|
9
|
Maryland
|
?
|
| Sleepy Creek Islands
|
10
|
Maryland
|
?
|
| unnamed island
|
11
|
Maryland
|
?
|
| unnamed island
|
12
|
Maryland
|
?
|
| Back Creek Island
|
13
|
Maryland
|
?
|
| unnamed island
|
14
|
Maryland
|
?
|
| unnamed island
|
15
|
Maryland
|
?
|
| Duck Island
|
16
|
Maryland
|
Washington County at Marlowe, West Virginia
|
| unnamed island
|
17
|
Maryland
|
?
|
| Shepherds Island
|
18
|
Maryland
|
Washington County at Marlowe, West Virginia
|
| Knott Island
|
19
|
Maryland
|
Washington County near Antietam
|
| Byrnes Island
|
20
|
Maryland
|
Washington County at Harper's Ferry, West Virginia
|
| unnamed island
|
21
|
Maryland
|
?
|
| Colonial Island
|
22
|
Maryland
|
Frederick County at Knoxville
|
| Catoctin Creek Island
|
23
|
Maryland
|
?
|
| unnamed island
|
24
|
Maryland
|
?
|
| Paton Island
|
25
|
Maryland
|
Frederick County at Point of Rocks
|
| unnamed island
|
26
|
Maryland
|
?
|
| Heaters Island
|
27
|
Maryland
|
Frederick County at Point of Rocks
|
| Mason Island
|
28
|
Maryland
|
Frederick County
|
| Nolands Island
|
29
|
Maryland
|
Frederick County
|
| Meadow Island
|
30
|
Maryland
|
Frederick County
|
| Birdsaw Island
|
31
|
Maryland
|
Frederick County
|
| Cox Island
|
32
|
Maryland
|
Frederick County
|
| Mason Island
|
33
|
Maryland
|
Montgomery County
|
| Harrison Island
|
34
|
Maryland
|
Montgomery County near River Creek, Virginia
|
| Selden Island
|
35
|
Maryland
|
Montgomery County near Leesburg, Virginia
|
| Van Deventer Island
|
36
|
Maryland
|
Montgomery County near Leesburg, Virginia
|
| Tenfoot Island
|
37
|
Maryland
|
Montgomery County near Leesburg, Virginia
|
| Sharpshin Island
|
38
|
Maryland
|
Montgomery County near Sterling, Virginia
|
| Lowes Island
|
39
|
Virginia
|
Loudoun County near Sterling
|
| Pond Island
|
40
|
Maryland
|
Montgomery County near Blockhouse Point
|
| Patowmack Island
|
41
|
Virginia
|
Fairfax County in Seneca Regional Park
|
| Elm Island
|
42
|
Maryland
|
Montgomery County near Blockhouse Point
|
| Grapevine Island
|
43
|
Maryland
|
Montgomery County near Blockhouse Point
|
| Katie Island
|
44
|
Maryland
|
Montgomery County near Blockhouse Point
|
| Torpedo Island
|
44
|
Maryland
|
Montgomery County near Pennyfield Lock
|
| Watkins Island
|
45
|
Maryland
|
Montgomery County
|
| Sycamore Island
|
46
|
Maryland
|
Montgomery County
|
| Clagett Island
|
47
|
Maryland
|
Montgomery County near Great Falls, Virginia
|
| Gladys Island
|
48
|
Maryland
|
Montgomery County
|
| Minnehaha Island
|
49
|
Maryland
|
Montgomery County
|
| Bealls Island
|
50
|
Maryland
|
Montgomery County
|
| Powhatan Island
|
51
|
Maryland
|
Montgomery County near Great Falls, Virginia
|
| Conn Island
|
52
|
Maryland
|
Montgomery County near Great Falls of the Potomac River
|
| Olmsted Island
(formerly Great Falls Island)
|
53
|
Maryland
|
Montgomery County at Great Falls of the Potomac River
|
| Rocky Islands
|
54
|
Maryland
|
Montgomery County in Great Falls Park
|
| Bear Island
|
55
|
Maryland
|
Montgomery County at Great Falls Park
|
| Sherwin Island
(formerly Cupid's Bower Island)
|
56
|
Maryland
|
Montgomery County at Great Falls Park
|
| Offutt Island
|
57
|
Maryland
|
Montgomery County
|
| Hermit Island
|
58
|
Maryland
|
Montgomery County in the Chesapeake and Ohio Canal National Historical Park
|
| Perry Island
|
59
|
Maryland
|
Montgomery County
|
| Herzog Island
|
60
|
Maryland
|
Montgomery County in the Chesapeake and Ohio Canal National Historical Park
|
| Turkey Island (Maryland)
|
61
|
Maryland
|
Montgomery County at the Yellow Falls
|
| Vaso Island
|
62
|
Maryland
|
Montgomery County in the Chesapeake and Ohio Canal National Historical Park
|
| Plummers Island
|
63
|
Maryland
|
Montgomery County near Cabin John
|
| Dots Island
|
64
|
Maryland
|
Montgomery County near Cabin John
|
| Swainson Island
|
65
|
Maryland
|
Montgomery County near Cabin John
|
| Wades Island
|
66
|
Maryland
|
Montgomery County near Cabin John
|
| Langley Island
|
67
|
Maryland
|
Montgomery County near Cabin John
|
| Minnie Island (Maryland)
|
68
|
Maryland
|
Montgomery County near Cabin John
|
| Cedar Island
|
69
|
Maryland
|
Montgomery County at Glen Echo
|
| Cabin John Island
|
70
|
Maryland
|
Montgomery County at Glen Echo
|
| Chatauqua Island
|
71
|
Maryland
|
Montgomery County at Glen Echo
|
| Ruppert Island
|
72
|
Maryland
|
Montgomery County at Glen Echo
|
| Sycamore Island
|
73
|
Maryland
|
Montgomery County
|
| Snake Island
|
74
|
Maryland
|
Montgomery County at Little Falls Dam
|
| High Island
|
75
|
Maryland
|
Montgomery County at Brookmont
|
| Three Sisters
|
76
|
District of Columbia
|
District of Columbia
|
| Theodore Roosevelt Island
|
77
|
District of Columbia
|
District of Columbia
|
| Little Island
|
78
|
District of Columbia
|
District of Columbia
|
| Columbia Island
|
79
|
District of Columbia
|
District of Columbia
|
| Daingerfield Island
|
80
|
Virginia
|
Alexandria, Virginia
|
| Goose Island
|
81
|
District of Columbia
|
District of Columbia at the mouth of Oxon Creek
|
| Rosilie Island
|
82
|
Maryland
|
Prince George's County at the Woodrow Wilson Memorial Bridge
|
| Hog Island
|
83
|
Virginia
|
Fairfax County, Virginia at Wellington Heights
|
| Chopawamsic Island
|
84
|
Virginia
|
Prince William County at Quantico
|
| Cobb Island
|
85
|
Maryland
|
Charles County
|
| Saint Margaret Island (Maryland)
|
86
|
Maryland
|
St. Mary's County
|
| Bullock Island
|
87
|
Maryland
|
St. Mary's County in St. Catherine Sound
|
| Saint Catherine Island
|
88
|
Maryland
|
St. Mary's County at St. Catherine Sound
|
| Saint Clement's Island
|
89
|
Maryland
|
St. Mary's County
|
| Saint George Island
|
90
|
Maryland
|
St. Mary's County
|
| Craney Island
|
?
|
Maryland
|
Charles County
|
| Harris Island
|
?
|
Maryland
|
Montgomery County
|
| Lock Island
|
?
|
Maryland
|
Montgomery County in the Chesapeake and Ohio Canal National Historical Park
|
