Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Uncle Zeke Island | Island | -8 | Cumberland | 43 48 09 N | 069 57 04 W |
| Underwood Ledge | Bar | -3 | Cumberland | 43 44 00 N | 070 11 47 W |
| Underwood School | School | 34 | Cumberland | 43 44 01 N | 070 12 37 W |
| Underwood Spring | Spring | 10 | Cumberland | 43 44 10 N | 070 12 08 W |
| Union Chapel | Church | 164 | Cumberland | 43 56 03 N | 070 26 26 W |
| Union Church | Church | 48 | Cumberland | 43 42 56 N | 070 20 06 W |
| Union Church | Church | 67 | Cumberland | 43 44 42 N | 070 21 18 W |
| Union Church | Church | 33 | Cumberland | 43 46 07 N | 069 58 15 W |
| Union Station Plaza Shopping Center | Locale | 9 | Cumberland | 43 39 07 N | 070 16 48 W |
| Union Wharf | Locale | 1 | Cumberland | 43 39 16 N | 070 15 08 W |
| Unitarian Universalist Church | Church | 18 | Cumberland | 43 40 39 N | 070 21 37 W |
| Unitarian Universalist Church | Church | 19 | Cumberland | 43 54 53 N | 069 57 56 W |
| Unitarian Universalist Church | Church | 21 | Cumberland | 43 54 40 N | 069 57 49 W |
| Unitarian Universalist Church of Westbrook | Church | 19 | Cumberland | 43 40 37 N | 070 21 39 W |
| United Church of Christ at North Gorham | Church | 68 | Cumberland | 43 48 04 N | 070 27 03 W |
| United States Courthouse | Building | 17 | Cumberland | 43 39 33 N | 070 15 28 W |
| United States Customs House | Building | 6 | Cumberland | 43 39 26 N | 070 15 05 W |
| United States Marine Hospital | Hospital | 12 | Cumberland | 43 41 17 N | 070 14 49 W |
| Unity of Greater Portland Church | Church | 18 | Cumberland | 43 40 10 N | 070 18 08 W |
| Universalist Meeting House | Church | 36 | Cumberland | 43 57 10 N | 070 15 54 W |
| University of Southern Maine at Gorham | School | 92 | Cumberland | 43 40 53 N | 070 26 49 W |
| University of Southern Maine at Portland | School | 11 | Cumberland | 43 39 46 N | 070 16 27 W |
| University of Southern Maine Libraries | Building | 6 | Cumberland | 43 39 47 N | 070 16 18 W |
| Upper Basket Ledge | Bar | 3 | Cumberland | 43 44 24 N | 070 09 37 W |
| Upper Bay | Lake | 87 | Cumberland | 43 54 52 N | 070 23 57 W |
| Upper Clapboard Island Ledge | Bar | -3 | Cumberland | 43 43 55 N | 070 10 34 W |
| Upper Coombs Island | Island | 6 | Cumberland | 43 51 58 N | 069 54 15 W |
| Upper Flag Island | Island | 0 | Cumberland | 43 43 28 N | 070 02 47 W |
| Upper Gloucester | Populated Place | 101 | Cumberland | 43 59 21 N | 070 17 40 W |
| Upper Goose Island | Island | 20 | Cumberland | 43 48 20 N | 070 01 55 W |
| Upper Green Islands | Island | 0 | Cumberland | 43 46 17 N | 070 04 58 W |
| Upper Harvey Cove | Bay | 81 | Cumberland | 43 52 58 N | 070 31 13 W |
| Upper Narrows | Gap | 94 | Cumberland | 43 54 27 N | 070 23 54 W |
| Upper Pond | Reservoir | 198 | Cumberland | 43 49 54 N | 070 44 08 W |
| Upper Ridge | Ridge | 224 | Cumberland | 44 06 38 N | 070 43 54 W |
| Upper Village (historical) | Populated Place | 41 | Cumberland | 43 48 10 N | 070 11 41 W |
| Upton-Hastings Hall | Building | 84 | Cumberland | 43 40 56 N | 070 26 53 W |
| Uptown Artwork | Locale | 33 | Cumberland | 43 39 13 N | 070 15 44 W |
| Vaill Island | Island | 4 | Cumberland | 43 40 39 N | 070 09 15 W |
| Valentine School | School | 26 | Cumberland | 43 40 20 N | 070 21 53 W |
| Valley Brook | Stream | | Cumberland | 43 57 45 N | 070 25 41 W |
| Varney Cemetery | Cemetery | 22 | Cumberland | 43 54 27 N | 069 57 00 W |
| Varney Hill | Summit | 118 | Cumberland | 43 50 38 N | 070 21 44 W |
| Vaughans Bridge (historical) | Bridge | -3 | Cumberland | 43 38 24 N | 070 16 53 W |
| Verrills Ledges | Bench | 108 | Cumberland | 43 49 46 N | 070 18 49 W |
| Veterans Memorial Bridge | Bridge | -9 | Cumberland | 43 38 33 N | 070 17 02 W |
| Vicki-Lin Camping Area | Locale | 99 | Cumberland | 44 01 47 N | 070 39 38 W |
| Victoria Mansion | Building | 6 | Cumberland | 43 39 20 N | 070 15 16 W |
| Village Elementary School | School | 65 | Cumberland | 43 40 40 N | 070 26 12 W |
| Village of Halidon (historical) | Populated Place | 55 | Cumberland | 43 41 47 N | 070 21 29 W |
| Village Square Information Center | Building | 40 | Cumberland | 43 51 22 N | 070 06 03 W |
| Vineyard Christian Fellowship | Church | 17 | Cumberland | 43 41 10 N | 070 19 34 W |
| Vocational Education Region 10 School | School | 32 | Cumberland | 43 54 23 N | 069 59 43 W |
| Wade Station Fish Hatchery | Locale | 122 | Cumberland | 44 00 33 N | 070 31 38 W |
| Wadsworth-Longfellow House | Building | 26 | Cumberland | 43 39 04 N | 070 15 39 W |
| Waites Landing | Populated Place | 7 | Cumberland | 43 42 22 N | 070 13 02 W |
| Waldo Point | Cape | 0 | Cumberland | 43 43 22 N | 070 06 39 W |
| Walker Art Gallery | Building | 22 | Cumberland | 43 54 28 N | 069 57 51 W |
| Walker Memorial Library | Building | 18 | Cumberland | 43 40 36 N | 070 21 50 W |
| Walnut Hill | Populated Place | 63 | Cumberland | 43 49 28 N | 070 14 48 W |
| Walnut Hill | Summit | 127 | Cumberland | 43 50 16 N | 070 15 37 W |
| Ward Brook | Stream | | Cumberland | 43 44 18 N | 070 26 21 W |
| Ward Cemetery | Cemetery | 177 | Cumberland | 43 55 05 N | 070 38 29 W |
| Wards Cove | Bay | 146 | Cumberland | 43 57 10 N | 070 41 55 W |
| Wards Cove | Populated Place | 85 | Cumberland | 43 49 53 N | 070 36 26 W |
| Wards Point | Cape | 82 | Cumberland | 43 53 45 N | 070 37 01 W |
| Wardtown | Summit | 73 | Cumberland | 43 55 00 N | 070 05 25 W |
| Warren Hill Gymnasium | Building | 96 | Cumberland | 43 40 50 N | 070 26 56 W |
| Watchic Pond | Lake | 84 | Cumberland | 43 44 37 N | 070 37 20 W |
| Watchic Pond | Reservoir | 81 | Cumberland | 43 44 48 N | 070 37 34 W |
| Watchic Pond Dam | Dam | 81 | Cumberland | 43 44 48 N | 070 37 34 W |
| Water Cove | Bay | 7 | Cumberland | 43 44 39 N | 069 59 21 W |
| Watsons Marina | Locale | 14 | Cumberland | 43 47 32 N | 069 53 33 W |
| Watts Ledge | Bar | 0 | Cumberland | 43 32 33 N | 070 13 18 W |
| Watts Point | Cape | 0 | Cumberland | 43 32 32 N | 070 13 35 W |
| Waynflete School | School | 46 | Cumberland | 43 38 52 N | 070 16 17 W |
| WBLM-FM (Portland) | Tower | 128 | Cumberland | 43 55 28 N | 070 29 26 W |
| WBOR-FM (Brunswick) | Tower | 22 | Cumberland | 43 54 34 N | 069 57 41 W |
| WCSH Radio Tower (Havre De Grace) | Tower | 22 | Cumberland | 43 36 17 N | 070 19 18 W |
| WCSH-TV (Portland) | Tower | 364 | Cumberland | 43 51 32 N | 070 42 38 W |
| WDCS-FM (Scarborough) | Tower | 40 | Cumberland | 43 35 24 N | 070 22 18 W |
| Webb Rowe Mountain | Summit | 402 | Cumberland | 43 51 57 N | 070 41 55 W |
| Webster Cemetery | Cemetery | 15 | Cumberland | 43 50 23 N | 070 09 05 W |
| Webster Field | Airport | 61 | Cumberland | 43 40 30 N | 070 29 42 W |
| Webster Rock | Bar | -2 | Cumberland | 43 39 31 N | 070 02 13 W |
| Weeman Brook | Stream | | Cumberland | 43 56 41 N | 070 40 42 W |
| Weeman Cemetery | Cemetery | 103 | Cumberland | 43 47 46 N | 070 45 43 W |
| Wentworth Cemetery | Cemetery | 145 | Cumberland | 43 50 27 N | 070 41 38 W |
| Wescutogo Hill | Summit | 75 | Cumberland | 43 51 04 N | 070 13 59 W |
| West Baldwin | Populated Place | 115 | Cumberland | 43 49 59 N | 070 46 40 W |
| West Bridgton | Populated Place | 152 | Cumberland | 44 03 51 N | 070 49 49 W |
| West Brown Cow | Island | -2 | Cumberland | 43 41 44 N | 070 04 23 W |
| West Cod Ledge | Bar | 0 | Cumberland | 43 34 07 N | 070 08 32 W |
| West Cod Ledge Rock | Bar | -3 | Cumberland | 43 34 19 N | 070 07 43 W |
| West Cumberland | Populated Place | 91 | Cumberland | 43 48 56 N | 070 18 51 W |
| West Cumberland Church Cemetery | Cemetery | 78 | Cumberland | 43 48 37 N | 070 18 43 W |
| West Cumberland United Methodist Church | Church | 87 | Cumberland | 43 48 35 N | 070 19 25 W |
| West Cumberland United Methodist Church | Church | 79 | Cumberland | 43 48 37 N | 070 18 44 W |
| West Cundy Point | Cape | 6 | Cumberland | 43 46 21 N | 069 54 06 W |
| West End | Populated Place | 47 | Cumberland | 43 39 02 N | 070 16 28 W |
| West Falmouth (historical) | Populated Place | 12 | Cumberland | 43 44 24 N | 070 17 42 W |
| West Falmouth Baptist Church | Church | 41 | Cumberland | 43 44 47 N | 070 18 09 W |
| West Falmouth Corner | Populated Place | 44 | Cumberland | 43 44 47 N | 070 18 11 W |
| West Falmouth Station (historical) | Locale | 13 | Cumberland | 43 44 24 N | 070 17 23 W |
| West Gate Shopping Center | Locale | 7 | Cumberland | 43 39 28 N | 070 17 58 W |
| West Gorham | Populated Place | 73 | Cumberland | 43 41 37 N | 070 29 31 W |
| West Gorham Cemetery | Cemetery | 106 | Cumberland | 43 43 11 N | 070 35 11 W |
| West Gray | Populated Place | 94 | Cumberland | 43 51 33 N | 070 22 31 W |
| West Harpswell | Populated Place | 39 | Cumberland | 43 46 00 N | 070 00 40 W |
| West Harpswell Elementary School | School | 22 | Cumberland | 43 45 28 N | 070 00 58 W |