| 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 |
