| Code | | Site | | Code | | Site | | Code | | Site |
| SAI | | Alki Bridge Club | |
SB6 | | Bellevue Sectional | |
SB8 | | Bothell Sectional | |
| SBC | | Seattle Bridge Center | |
SBG | | Broadmoor Golf and CC | |
SDM | | Des Moines Bridge | |
| SES | | Eastside Bridge Center Inc | |
SHK | | Husky Bridge Club | |
SK5 | | Kenmore Sectional | |
| SK7 | | Kent Sectional | |
SM6 | | Mercer Island Sectional | |
SMA | | MAM | |
| SMC | | Mercercrest BC | |
SMI | | ??? | |
SR4 | | Renton Sectional | |
| SR6 | | Redmond Sectional | |
SS6 | | Shoreline Sectional | |
SS7 | | Seattle Sectional | |
| SSP | | Sandpoint Ctry Club DBC | |
SST | | Seattle Tennis Club BC | |
STT | | 13 Top Tricks Bridge Club | |
| SVI | | Vashon Bridge Club | |
SW7 | | Woodinville Sectional | |
SWU | | Womens University BC | |