| Table ID No. | MCAG | Legal Name | Entity Name | Government Description |
| 1404 | 1544 | Badger Mountain Irrigation District | Badger Mountain Irrigation District | Irrigation and Reclamation District |
| 865 | 1163 | Bainbridge Island Fire Department | Bainbridge Island Fire Department | Fire Protection District |
| 1576 | 1685 | Bainbridge Island Park and Recreation District | Bainbridge Island Park and Recreation District | Park and Recreation District |
| 1804 | 1925 | Bainbridge Island School District No. 303 | Bainbridge Island School District No 303 | School Districts |
| 2157 | 2281 | Bainbridge Island Water District | Bainbridge Island Water District | Water/Sewer District |
| 231 | 0461 | City of Bainbridge Island | Bainbridge Island, City of | City/Town |
| 507 | S527 | Washington State Barley Commission | Barley Commission, Washington State | Commodity Commissions |
| 528 | S695 | Bates Technical College | Bates Technical College | Community or Technical College |
| 1805 | 1843 | Battle Ground School District No. 119 | Battle Ground School District No 119 | School Districts |
| 232 | 0238 | City of Battle Ground | Battle Ground, City of | City/Town |
| 2158 | 2209 | Bayview Beach Water District | Bayview Beach Water District | Water/Sewer District |
| 2159 | 2122 | Beacon Hill Sewer District | Beacon Hill Sewer District | Water/Sewer District |
| 233 | 0372 | Town of Beaux Arts Village | Beaux Arts, Town of | City/Town |
| 508 | S502 | Washington State Beef Commission | Beef Commission, Washington State | Commodity Commissions |
| 1405 | 1545 | Beehive Irrigation District | Beehive Irrigation District | Irrigation and Reclamation District |
| 2160 | 2292 | Belfair Water District | Belfair Water District | Water/Sewer District |
| 529 | S627 | Bellevue Community College | Bellevue Community College | Community or Technical College |
| 1713 | 0760 | Bellevue Convention Center Authority | Bellevue Convention Center Authority | Public Development Authority |
| 1806 | 1913 | Bellevue School District No. 405 | Bellevue School District No 405 | School Districts |
| 234 | 0374 | City of Bellevue | Bellevue, City of | City/Town |
| 1344 | 1522 | Bellingham Housing Authority | Bellingham Housing Authority | Housing Authority |
| 794 | 0625 | Port of Bellingham Industrial Development Corporation | Bellingham Industrial Development Corporation, Port of | Economic/Industrial Development |
| 1807 | 2083 | Bellingham School District No. 501 | Bellingham School District No 501 | School Districts |
| 530 | S694 | Bellingham Technical College | Bellingham Technical College | Community or Technical College |
| 235 | 0776 | City of Bellingham | Bellingham, City of | City/Town |
| 1618 | 1765 | Port of Bellingham | Bellingham, Port of | Port District (Includes Airports) |
| 2094 | 0376 | Ben Franklin Transit | Ben Franklin Transit | Transit/Transportation Authority |
| 1808 | 1809 | Benge School District No. 122 | Benge School District No 122 | School Districts |
| 236 | 0199 | City of Benton City | Benton City, City of | City/Town |
| 109 | 1022 | Benton Clean Air Authority | Benton Clean Air Authority | Air Pollution District |
| 562 | 2385 | Benton Conservation District | Benton Conservation District | Conservation District |
| 618 | 0095 | Benton County | Benton County | County |
| 655 | 0884 | Benton County Dike District No. 1 | Benton County Dike District No 1 | Diking/Drainage District |
| 656 | 0885 | Benton County Drainage District No. 1 | Benton County Drainage District No 1 | Diking/Drainage District |
| 657 | 0101 | Benton County Drainage District No. 10 | Benton County Drainage District No 10 | Diking/Drainage District |
| 658 | 0102 | Benton County Drainage District No. 11 | Benton County Drainage District No 11 | Diking/Drainage District |
| 659 | 0641 | Benton County Drainage District No. 11A | Benton County Drainage District No 11A | Diking/Drainage District |
| 660 | 0100 | Benton County Drainage District No. 12 | Benton County Drainage District No 12 | Diking/Drainage District |
| 661 | 0094 | Benton County Drainage District No. 4A | Benton County Drainage District No 4A | Diking/Drainage District |
| 662 | 0096 | Benton County Drainage District No. 6 | Benton County Drainage District No 6 | Diking/Drainage District |
| 663 | 0098 | Benton County Drainage District No. 9 | Benton County Drainage District No 9 | Diking/Drainage District |
| 664 | 0629 | Benton County Drainage District No. 9A | Benton County Drainage District No 9A | Diking/Drainage District |
| 831 | 0768 | Benton County Emergency Management | Benton County Emergency Management | Emergency Management Services |
| 866 | 1037 | Benton County Fire Protection District No. 1 | Benton County Fire Protection District No 1 | Fire Protection District |
| 867 | 1038 | Benton County Fire Protection District No. 2 | Benton County Fire Protection District No 2 | Fire Protection District |
| 868 | 1039 | Benton County Fire Protection District No. 3 | Benton County Fire Protection District No 3 | Fire Protection District |
| 869 | 1040 | Benton County Fire Protection District No. 4 | Benton County Fire Protection District No 4 | Fire Protection District |
| 870 | 1041 | Benton County Fire Protection District No. 5 | Benton County Fire Protection District No 5 | Fire Protection District |
| 871 | 0511 | Benton County Fire Protection District No. 6 | Benton County Fire Protection District No 6 | Fire Protection District |
| 1406 | 1537 | Benton County Irrigation District | Benton County Irrigation District | Irrigation and Reclamation District |
| 1561 | 1662 | Benton County Mosquito Control District | Benton County Mosquito Control District | Mosquito Control District |
| 1756 | 1768 | Benton County Public Utility District No. 1 | Benton County Public Utility District No 1 | Public Utility District (PUD) |
| 2131 | 2795 | Benton County Water Conservancy Board | Benton County Water Conservancy Board | Water Conservation Board |
| 1619 | 1698 | Port of Benton | Benton, Port of | Port District (Includes Airports) |
| 609 | 0863 | Benton-Franklin Council of Governments | Benton-Franklin Council of Governments | Council of Govt's/Conference of Govt's |
| 1274 | 1437 | Benton-Franklin Health District | Benton-Franklin Health District | Health District |
| 1809 | 2005 | Bethel School District No. 403 | Bethel School District No 403 | School Districts |
| 2161 | 2202 | Beverly Water District | Beverly Water District | Water/Sewer District |
| 1810 | 1936 | Bickleton School District No. 203 | Bickleton School District No 203 | School Districts |
| 1540 | 0733 | Bi-County Police Information Network | Bi-County Police Information Network | Miscellaneous |
| 531 | S629 | Big Bend Community College | Big Bend Community College | Community or Technical College |
| 237 | 0477 | City of Bingen | Bingen, City of | City/Town |
| 2162 | 2328 | Birch Bay Water and Sewer District | Birch Bay Water and Sewer District | Water/Sewer District |
| 2163 | 2197 | Black Diamond Water District | Black Diamond Water District | Water/Sewer District |
| 238 | 0379 | City of Black Diamond | Black Diamond, City of | City/Town |
| 1407 | 2650 | Black Sands Irrigation District | Black Sands Irrigation District | Irrigation and Reclamation District |
| 1811 | 2085 | Blaine School District No. 503 | Blaine School District No 503 | School Districts |
| 239 | 0780 | City of Blaine | Blaine, City of | City/Town |
| 665 | 0992 | Blake Drainage District | Blake Drainage District | Diking/Drainage District |
| 1408 | 1603 | Blalock Irrigation District No. 3 | Blalock Irrigation District No 3 | Irrigation and Reclamation District |
| 1409 | 1612 | Blalock Orchard Irrigation District No. 12 | Blalock Orchard Irrigation District No 12 | Irrigation and Reclamation District |
| 11 | S315 | Department of Services for the Blind | Blind, Department of Services for the | Agency, Commission, or Board |
| 2164 | 0200 | Blue Spruce Water District | Blue Spruce Water District | Water/Sewer District |
| 509 | S503 | Washington State Blueberry Commission | Blueberry Commission, Washington State | Commodity Commissions |
| 1812 | 1954 | Boistfort School District No. 234 | Boistfort School District No 234 | School Districts |
| 240 | 0567 | City of Bonney Lake | Bonney Lake, City of | City/Town |
| 241 | 0381 | City of Bothell | Bothell, City of | City/Town |
| 1345 | 1512 | The Housing Authority of the City of Bremerton | Bremerton Housing Authority | Housing Authority |
| 1813 | 1924 | Bremerton School District No. 100-C | Bremerton School District No 100-C | School Districts |
| 242 | 0452 | City of Bremerton | Bremerton, City of | City/Town |
| 1620 | 1729 | Port of Bremerton | Bremerton, Port of | Port District (Includes Airports) |
| 1410 | 1582 | Brewster Flat Irrigation District | Brewster Flat Irrigation District | Irrigation and Reclamation District |
| 1346 | 1312 | Housing Authority of Brewster | Brewster Housing Authority | Housing Authority |
| 1814 | 1978 | Brewster School District No. 111 | Brewster School District No 111 | School Districts |
| 243 | 0523 | City of Brewster | Brewster, City of | City/Town |
| 1411 | 1569 | Bridgeport Bar Irrigation District | Bridgeport Bar Irrigation District | Irrigation and Reclamation District |
| 1412 | 1568 | Bridgeport Irrigation District | Bridgeport Irrigation District | Irrigation and Reclamation District |
| 1815 | 1855 | Bridgeport School District No. 75 | Bridgeport School District No 75 | School Districts |
| 244 | 0274 | City of Bridgeport | Bridgeport, City of | City/Town |
| 245 | 0657 | City of Brier | Brier, City of | City/Town |
| 1816 | 1899 | Brinnon School District No. 46 | Brinnon School District No 46 | School Districts |
| 1621 | 1730 | Port of Brownsville | Brownsville, Port of | Port District (Includes Airports) |
| 246 | 0570 | City of Buckley | Buckley, City of | City/Town |
| 247 | 0746 | Town of Bucoda | Bucoda, Town of | City/Town |
| 1413 | 1618 | Buena Irrigation District | Buena Irrigation District | Irrigation and Reclamation District |
| 510 | S505 | Washington State Bulb Commission | Bulb Commission, Washington State | Commodity Commissions |
| 1414 | 1604 | Burbank Irrigation District No. 4 | Burbank Irrigation District No 4 | Irrigation and Reclamation District |
| 248 | 0801 | City of Burien | Burien, City of | City/Town |
| 2165 | 0194 | Burbank Water District No. 4 | Burkank Water District No. 4 | Water/Sewer District |
| 1714 | 0614 | Burke-Gilman Place Public Development Authority | Burke-Gilman Place Public Development Authority | Public Development Authority |
| 249 | 0633 | City of Burlington | Burlington, City of | City/Town |
| 1817 | 2014 | Burlington-Edison School District No. 100 | Burlington-Edison School District No 100 | School Districts |
| 2166 | 2298 | Burnett Water District | Burnett Water District | Water/Sewer District |
| 666 | 1009 | Butler Drainage District | Butler Drainage District | Diking/Drainage District |
