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 301–400
3,222 county equivalents · page 4 of 33
What this part of the ranking shows
This page runs from Ventura County, California at 16.577% water to Union County, Tennessee at 9.531% water. The 100 entries represent 34 state-level jurisdictions. Florida has the most entries on this page (10).
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 |
|---|---|---|---|---|---|
| 301 | Ventura County | California | 1,840.8 | 2,206.6 | 16.6% |
| 302 | Orange County | California | 793.2 | 949.7 | 16.5% |
| 303 | Cass County | Minnesota | 2,021.5 | 2,414 | 16.3% |
| 304 | Macomb County | Michigan | 479.4 | 570.9 | 16% |
| 305 | Mille Lacs County | Minnesota | 572.3 | 681.5 | 16% |
| 306 | Baraga County | Michigan | 898.4 | 1,068.9 | 16% |
| 307 | Whatcom County | Washington | 2,107.9 | 2,504.9 | 15.8% |
| 308 | Onslow County | North Carolina | 762.1 | 905.2 | 15.8% |
| 309 | Vilas County | Wisconsin | 857.7 | 1,017.7 | 15.7% |
| 310 | Waldo County | Maine | 730.2 | 864.4 | 15.5% |
| 311 | Brazoria County | Texas | 1,363.3 | 1,608.7 | 15.3% |
| 312 | Erie County | New York | 1,042.8 | 1,226.9 | 15% |
| 313 | Flagler County | Florida | 486.2 | 570.8 | 14.8% |
| 314 | Sabine County | Texas | 491.7 | 576.6 | 14.7% |
| 315 | Rockwall County | Texas | 127.2 | 148.9 | 14.6% |
| 316 | Los Angeles County | California | 4,060.3 | 4,749.4 | 14.5% |
| 317 | Lake County | Tennessee | 165.8 | 193.9 | 14.5% |
| 318 | Belknap County | New Hampshire | 401.9 | 470 | 14.5% |
| 319 | Grays Harbor County | Washington | 1,902.3 | 2,223.6 | 14.5% |
| 320 | Haines Borough | Alaska | 2,339.1 | 2,733.5 | 14.4% |
| 321 | Sabine Parish | Louisiana | 866.6 | 1,011.5 | 14.3% |
| 322 | Liberty County | Georgia | 516.5 | 602.5 | 14.3% |
| 323 | Hancock County | Mississippi | 474 | 552.8 | 14.3% |
| 324 | Box Elder County | Utah | 5,781.3 | 6,729.2 | 14.1% |
| 325 | Brown County | Wisconsin | 530.1 | 615.7 | 13.9% |
| 326 | Westchester County | New York | 430.8 | 500.1 | 13.9% |
| 327 | Okeechobee County | Florida | 769.3 | 892 | 13.8% |
| 328 | St. Clair County | Michigan | 721.5 | 836.5 | 13.7% |
| 329 | New Castle County | Delaware | 426.3 | 494 | 13.7% |
| 330 | Crow Wing County | Minnesota | 998.5 | 1,156.7 | 13.7% |
| 331 | Beaufort County | North Carolina | 832.7 | 962.8 | 13.5% |
| 332 | Chittenden County | Vermont | 536.9 | 620.7 | 13.5% |
| 333 | Oconto County | Wisconsin | 997.5 | 1,148.8 | 13.2% |
| 334 | McIntosh County | Oklahoma | 618.3 | 712.1 | 13.2% |
| 335 | Marshall County | Oklahoma | 371.5 | 427 | 13% |
| 336 | Isle of Wight County | Virginia | 315.7 | 362.8 | 13% |
| 337 | Monterey County | California | 3,281.7 | 3,771.2 | 13% |
| 338 | Rockland County | New York | 173.7 | 199.5 | 12.9% |
| 339 | Kusilvak Census Area | Alaska | 17,151.5 | 19,658.6 | 12.8% |
| 340 | Clarendon County | South Carolina | 607.2 | 695.7 | 12.7% |
| 341 | Añasco Municipio | Puerto Rico | 39.3 | 44.9 | 12.5% |
| 342 | Rockingham County | New Hampshire | 695.6 | 795.2 | 12.5% |
| 343 | Jefferson County | Tennessee | 275.2 | 314.3 | 12.5% |
| 344 | Southeastern Connecticut Planning Region | Connecticut | 598.1 | 681.7 | 12.3% |
| 345 | Baltimore County | Maryland | 598.4 | 681.7 | 12.2% |
| 346 | Anchorage Municipality | Alaska | 1,706.8 | 1,944.5 | 12.2% |
| 347 | Northwest Arctic Borough | Alaska | 35,672.3 | 40,619.8 | 12.2% |
| 348 | Baltimore city | Maryland | 80.9 | 92.1 | 12.1% |
| 349 | Orange County | Texas | 333.8 | 379.5 | 12% |
| 350 | Humboldt County | California | 3,568 | 4,052.3 | 11.9% |
| 351 | Tuscola County | Michigan | 804.9 | 913.9 | 11.9% |
| 352 | Putnam County | Florida | 728.4 | 826.9 | 11.9% |
| 353 | Osceola County | Florida | 1,327.3 | 1,506 | 11.9% |
| 354 | Douglas County | Wisconsin | 1,304.3 | 1,479.7 | 11.9% |
| 355 | Coos County | Oregon | 1,596.1 | 1,806.4 | 11.6% |
| 356 | Douglas County | Minnesota | 636.9 | 720.2 | 11.6% |
| 357 | Richmond County | Virginia | 191.5 | 216.4 | 11.5% |
| 358 | Otter Tail County | Minnesota | 1,971.6 | 2,224.3 | 11.4% |
| 359 | Rains County | Texas | 229.5 | 258.8 | 11.3% |
| 360 | Marshall County | Kentucky | 302.1 | 340.2 | 11.2% |
| 361 | Jefferson County | Florida | 598.1 | 672.6 | 11.1% |
| 362 | Dillingham Census Area | Alaska | 18,355.9 | 20,628 | 11% |
| 363 | Salem County | New Jersey | 331.9 | 372.6 | 10.9% |
| 364 | Sonoma County | California | 1,575.3 | 1,767.3 | 10.9% |
| 365 | Norfolk County | Massachusetts | 396.1 | 444.3 | 10.9% |
| 366 | Contra Costa County | California | 716.9 | 803.9 | 10.8% |
| 367 | Bethel Census Area | Alaska | 40,654.9 | 45,555.6 | 10.8% |
| 368 | Fulton County | Kentucky | 205.9 | 230.7 | 10.7% |
| 369 | Nassau County | Florida | 648.7 | 725.9 | 10.6% |
| 370 | Berkeley County | South Carolina | 1,103.6 | 1,234.5 | 10.6% |
| 371 | District of Columbia | District of Columbia | 61.1 | 68.4 | 10.6% |
| 372 | Polk County | Florida | 1,798.8 | 2,010.7 | 10.5% |
| 373 | Calhoun County | Illinois | 253.8 | 283.6 | 10.5% |
| 374 | Russell County | Kentucky | 253.3 | 282.9 | 10.5% |
| 375 | Charles City County | Virginia | 182.9 | 204.2 | 10.4% |
| 376 | Ramsey County | Minnesota | 152.3 | 170 | 10.4% |
| 377 | Seminole County | Florida | 309.4 | 345.3 | 10.4% |
| 378 | San Augustine County | Texas | 530.7 | 592.3 | 10.4% |
| 379 | Kent County | Rhode Island | 168.6 | 188.1 | 10.4% |
| 380 | Roscommon County | Michigan | 519.9 | 580 | 10.4% |
| 381 | Alameda County | California | 737.5 | 821.2 | 10.2% |
| 382 | Surry County | Virginia | 278.9 | 310.3 | 10.1% |
| 383 | Essex County | Virginia | 257.4 | 286.2 | 10.1% |
| 384 | Clay County | Georgia | 195.4 | 217.2 | 10.1% |
| 385 | Yates County | New York | 338.2 | 375.8 | 10% |
| 386 | Orange County | Florida | 903 | 1,003.4 | 10% |
| 387 | Meigs County | Tennessee | 195.1 | 216.7 | 9.9% |
| 388 | Oneida County | Wisconsin | 1,113.9 | 1,236.6 | 9.9% |
| 389 | Lake County | Montana | 1,490.5 | 1,654 | 9.9% |
| 390 | Ballard County | Kentucky | 247.1 | 274 | 9.8% |
| 391 | Skagit County | Washington | 1,730.2 | 1,917 | 9.7% |
| 392 | Marinette County | Wisconsin | 1,399.5 | 1,550 | 9.7% |
| 393 | Horry County | South Carolina | 1,133.1 | 1,254.7 | 9.7% |
| 394 | St. Martin Parish | Louisiana | 737.5 | 816.7 | 9.7% |
| 395 | Bonner County | Idaho | 1,733.2 | 1,918.1 | 9.6% |
| 396 | Alachua County | Florida | 875.7 | 968.8 | 9.6% |
| 397 | Benton County | Tennessee | 394.3 | 436.2 | 9.6% |
| 398 | Mendocino County | California | 3,506.8 | 3,878.2 | 9.6% |
| 399 | Hart County | Georgia | 232.4 | 256.9 | 9.5% |
| 400 | Union County | Tennessee | 223.6 | 247.1 | 9.5% |
Read the differences behind ranks 301–400
The median water share among these 100 entries is 11.939 %. The first and last entries span 7.046 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
- Florida10 entries · 10% of this page
- California9 entries · 9% of this page
- Alaska6 entries · 6% of this page
- Minnesota6 entries · 6% of this page
- Texas6 entries · 6% of this page
- Wisconsin6 entries · 6% of this page
The remaining 28 jurisdictions contribute 57 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.