Counties with the highest water share
The percentage of each county equivalent’s published square-mile total that is water. A high percentage reflects water assigned to the statistical geography, not necessarily lakes entirely enclosed by its land boundary.
Ranks 101–200
3,222 county equivalents · page 2 of 33
What this part of the ranking shows
This page runs from Somerset County, Maryland at 47.612% water to Lake and Peninsula Borough, Alaska at 29.322% water. The 100 entries represent 23 state-level jurisdictions. Puerto Rico has the most entries on this page (22).
Rank numbers continue across pages and describe the full selected ranking. They are not state ranks. Start at rank 1 for the leading entries, or open a county profile for its state rank and median comparisons.
| Rank | County / equivalent | State | Land mi² | Total mi² | Water share |
|---|---|---|---|---|---|
| 101 | Somerset County | Maryland | 319.7 | 610.4 | 47.6% |
| 102 | Marquette County | Michigan | 1,809.1 | 3,425 | 47.2% |
| 103 | Emmet County | Michigan | 467.5 | 882 | 47% |
| 104 | Lorain County | Ohio | 490.5 | 922.8 | 46.8% |
| 105 | Arenac County | Michigan | 363.2 | 680.7 | 46.6% |
| 106 | Bristol County | Rhode Island | 24.1 | 44.7 | 46.1% |
| 107 | Dorchester County | Maryland | 540.8 | 983 | 45% |
| 108 | Kodiak Island Borough | Alaska | 6,689.9 | 12,152 | 44.9% |
| 109 | Maunabo Municipio | Puerto Rico | 21.2 | 38.4 | 44.8% |
| 110 | Iberia Parish | Louisiana | 574.7 | 1,040.4 | 44.8% |
| 111 | Norfolk city | Virginia | 53.3 | 96.4 | 44.7% |
| 112 | Luquillo Municipio | Puerto Rico | 25.8 | 46.5 | 44.5% |
| 113 | Toa Baja Municipio | Puerto Rico | 23.3 | 41.8 | 44.3% |
| 114 | Van Buren County | Michigan | 607.8 | 1,089.9 | 44.2% |
| 115 | Richmond County | New York | 57.5 | 102.9 | 44.1% |
| 116 | Juana Díaz Municipio | Puerto Rico | 60.4 | 107.2 | 43.7% |
| 117 | Talbot County | Maryland | 268.6 | 476.8 | 43.7% |
| 118 | Bristol Bay Borough | Alaska | 481.4 | 849 | 43.3% |
| 119 | Sarasota County | Florida | 556.1 | 975.6 | 43% |
| 120 | Lucas County | Ohio | 339.7 | 595.8 | 43% |
| 121 | Lancaster County | Virginia | 133.3 | 231.4 | 42.4% |
| 122 | Newport News city | Virginia | 69 | 119.6 | 42.3% |
| 123 | Chippewa County | Michigan | 1,558.5 | 2,698.5 | 42.2% |
| 124 | Cook County | Illinois | 944.9 | 1,634.6 | 42.2% |
| 125 | Harrison County | Mississippi | 573.7 | 984.7 | 41.7% |
| 126 | Escambia County | Florida | 657 | 1,125.7 | 41.6% |
| 127 | New Hanover County | North Carolina | 192.3 | 328.9 | 41.5% |
| 128 | Washington County | Rhode Island | 329.3 | 562.8 | 41.5% |
| 129 | Delta County | Michigan | 1,171.1 | 1,991.3 | 41.2% |
| 130 | Greater Bridgeport Planning Region | Connecticut | 140.2 | 238.2 | 41.1% |
| 131 | Terrebonne Parish | Louisiana | 1,229.9 | 2,082.2 | 40.9% |
| 132 | South Central Connecticut Planning Region | Connecticut | 367.3 | 619.6 | 40.7% |
| 133 | Lajas Municipio | Puerto Rico | 60 | 101.2 | 40.7% |
| 134 | Ponce Municipio | Puerto Rico | 114.9 | 193.6 | 40.6% |
| 135 | Essex County | Massachusetts | 492.5 | 828.5 | 40.6% |
| 136 | Queens County | New York | 108.7 | 181.5 | 40.1% |
| 137 | Pamlico County | North Carolina | 336.5 | 561.6 | 40.1% |
| 138 | Sitka City and Borough | Alaska | 2,870.3 | 4,774.5 | 39.9% |
| 139 | Isabela Municipio | Puerto Rico | 55.3 | 91.8 | 39.8% |
| 140 | Plymouth County | Massachusetts | 658.5 | 1,093.3 | 39.8% |
| 141 | Barceloneta Municipio | Puerto Rico | 18.7 | 31 | 39.7% |
| 142 | Sanilac County | Michigan | 962.6 | 1,589.9 | 39.5% |
| 143 | San Mateo County | California | 448.6 | 741 | 39.5% |
| 144 | Citrus County | Florida | 582 | 960.7 | 39.4% |
| 145 | Salinas Municipio | Puerto Rico | 69.4 | 114.1 | 39.2% |
| 146 | Guayama Municipio | Puerto Rico | 65 | 106.8 | 39.1% |
| 147 | Calvert County | Maryland | 213.2 | 345.1 | 38.2% |
| 148 | Middlesex County | Virginia | 130.3 | 210.8 | 38.2% |
| 149 | Patillas Municipio | Puerto Rico | 46.6 | 75.2 | 38% |
| 150 | Schoolcraft County | Michigan | 1,171.9 | 1,883.9 | 37.8% |
| 151 | San Juan Municipio | Puerto Rico | 47.9 | 77 | 37.8% |
| 152 | Beaufort County | South Carolina | 576 | 923.5 | 37.6% |
| 153 | Humacao Municipio | Puerto Rico | 44.7 | 71.4 | 37.4% |
| 154 | Nassau County | New York | 284.5 | 453.4 | 37.2% |
| 155 | Marin County | California | 520.1 | 828.2 | 37.2% |
| 156 | Chugach Census Area | Alaska | 9,574.5 | 15,187.9 | 37% |
| 157 | Manatí Municipio | Puerto Rico | 44.7 | 70.6 | 36.6% |
| 158 | Kenai Peninsula Borough | Alaska | 16,017.1 | 24,721.2 | 35.2% |
| 159 | Clallam County | Washington | 1,738.8 | 2,669 | 34.9% |
| 160 | Lincoln County | Maine | 455.9 | 699.6 | 34.8% |
| 161 | Brevard County | Florida | 1,015 | 1,557 | 34.8% |
| 162 | Tyrrell County | North Carolina | 390.8 | 597.2 | 34.6% |
| 163 | Guayanilla Municipio | Puerto Rico | 42.2 | 64.2 | 34.2% |
| 164 | Peñuelas Municipio | Puerto Rico | 44.7 | 67.9 | 34.2% |
| 165 | Quebradillas Municipio | Puerto Rico | 22.7 | 34.3 | 34% |
| 166 | Hernando County | Florida | 473 | 715.4 | 33.9% |
| 167 | Wakulla County | Florida | 606.4 | 916.9 | 33.9% |
| 168 | Yabucoa Municipio | Puerto Rico | 55.2 | 83.2 | 33.7% |
| 169 | Cameron Parish | Louisiana | 1,290.7 | 1,936.7 | 33.4% |
| 170 | New York County | New York | 22.7 | 33.9 | 33.1% |
| 171 | Kent County | Maryland | 276.9 | 413.4 | 33% |
| 172 | Northumberland County | Virginia | 191.4 | 285.6 | 33% |
| 173 | Charleston County | South Carolina | 918.3 | 1,366.9 | 32.8% |
| 174 | Houghton County | Michigan | 1,009.1 | 1,501.5 | 32.8% |
| 175 | Vega Baja Municipio | Puerto Rico | 45.9 | 68.2 | 32.8% |
| 176 | Worcester County | Maryland | 468.3 | 694.9 | 32.6% |
| 177 | Dixie County | Florida | 705 | 1,043.4 | 32.4% |
| 178 | Hancock County | Maine | 1,587.2 | 2,344.9 | 32.3% |
| 179 | Río Grande Municipio | Puerto Rico | 60.6 | 89.5 | 32.3% |
| 180 | Aguada Municipio | Puerto Rico | 30.8 | 45.5 | 32.2% |
| 181 | Matagorda County | Texas | 1,093.1 | 1,612.5 | 32.2% |
| 182 | Jefferson County | New York | 1,267.9 | 1,856.6 | 31.7% |
| 183 | Hoonah-Angoon Census Area | Alaska | 6,560 | 9,585.4 | 31.6% |
| 184 | Chambers County | Texas | 597.2 | 871.1 | 31.4% |
| 185 | Sagadahoc County | Maine | 254 | 370 | 31.4% |
| 186 | Ocean County | New Jersey | 628.3 | 914.8 | 31.3% |
| 187 | Cumberland County | Maine | 836.2 | 1,217.5 | 31.3% |
| 188 | Chatham County | Georgia | 432.8 | 630 | 31.3% |
| 189 | Cataño Municipio | Puerto Rico | 4.8 | 7 | 31% |
| 190 | Taylor County | Florida | 1,043.3 | 1,511.9 | 31% |
| 191 | Jackson County | Mississippi | 722.8 | 1,043.4 | 30.7% |
| 192 | Gulf County | Florida | 553.5 | 794.6 | 30.3% |
| 193 | Cameron County | Texas | 891.7 | 1,279.7 | 30.3% |
| 194 | Kitsap County | Washington | 395.1 | 565.8 | 30.2% |
| 195 | St. Charles Parish | Louisiana | 277.7 | 396.9 | 30% |
| 196 | Bay County | Michigan | 442.4 | 630.7 | 29.9% |
| 197 | Levy County | Florida | 1,118.3 | 1,591 | 29.7% |
| 198 | Lake County | Minnesota | 2,109.1 | 2,990.9 | 29.5% |
| 199 | Anne Arundel County | Maryland | 414.8 | 587.8 | 29.4% |
| 200 | Lake and Peninsula Borough | Alaska | 23,896.5 | 33,810.4 | 29.3% |
Read the differences behind ranks 101–200
The median water share among these 100 entries is 37.785 %. The first and last entries span 18.29 percentage points. This median describes the entries on this page, not the full national dataset. Pagination is a browsing boundary, not a distinct geographic region.
A percentage-point gap is the subtraction of two shares. It differs from a relative percentage change, and it does not tell you the difference in water square miles. Check each profile’s original water measurement if absolute water extent is your question.
Where the entries on this page are located
- Puerto Rico22 entries · 22% of this page
- Florida10 entries · 10% of this page
- Michigan10 entries · 10% of this page
- Alaska7 entries · 7% of this page
- Maryland7 entries · 7% of this page
- New York5 entries · 5% of this page
The remaining 17 jurisdictions contribute 39 entries. The list above shows the six most represented, with alphabetical ordering when counts tie.
These counts describe representation in this slice of the ranking. They do not measure a state’s share of national land or population. Compare the first and last county equivalents on this page to inspect land, water, and total area separately.
Read the geographic explanation behind this ranking, or return to the ranking overview for the national distribution and guidance on selecting a measurement.
Land rankings use original ALAND square meters; total-area rankings use ALAND + AWATER. Exact ties use ascending GEOID. Displayed square-mile values are rounded. Read the methodology.