| Post Office Name | City/State | Address | Phone Number | Action |
|---|---|---|---|---|
| Benton City Post Office | BENTON CITY, WA 99320 | 909 Dale Ave | 5095882740 | View Details Get Directions |
| Grandview Post Office | GRANDVIEW, WA 98930 | 116 Grandridge Rd | 5098821067 | View Details Get Directions |
| Kennewick Post Office | KENNEWICK, WA 99336 | 525 S Auburn St | 5095858310 | View Details Get Directions |
| Paterson Post Office | PATERSON, WA 99345 | 48801 W Prior Ave | 5098752531 | View Details Get Directions |
| Plymouth Post Office | PLYMOUTH, WA 99346 | 72304 Se 3rd Ave | 5097831671 | View Details Get Directions |
| Prosser Post Office | PROSSER, WA 99350 | 1103 Meade Ave | 5097860264 | View Details Get Directions |
| Richland Post Office | RICHLAND, WA 99352 | 639 Cullum Ave | 5099437531 | View Details Get Directions |
| Sunnyside Post Office | SUNNYSIDE, WA 98944 | 713 E Edison Ave | 5098375039 | View Details Get Directions |
| Sunnyside Carrier Annex Post Office | SUNNYSIDE, WA 98944 | 770 Custer Ave | 5098378165 | View Details Get Directions |
| West Richland Post Office | WEST RICHLAND, WA 99353 | 4801 W Van Giesen St | 5099670500 | View Details Get Directions |
| Mailbox in Post Office Lobby | WEST RICHLAND, WA 99353 | 1401 Bombing Range Rd | -- | Get Directions |
| Mailbox in Post Office Lobby | KENNEWICK, WA 99337 | 1410 W 27th Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 100 Columbia Ctr | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 1009 N Center Pkwy | -- | Get Directions |
| Public Collection Box | PROSSER, WA 99350 | 101 Merlot Dr | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 1029 N Kellogg St | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 114 Vista Way | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99354 | 1301 George Washington Way | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99354 | 1540 Jadwin Ave | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99354 | 1906 George Washington Way | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99352 | 1950 Keene Rd | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 203 W 1st Ave | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99354 | 2143 Van Giesen St | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 2203 W 4th Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99337 | 2720 S Quillan St | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 2721 W 10th Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 2811 W 10th Ave | -- | Get Directions |
| Public Collection Box | SUNNYSIDE, WA 98944 | 301 N 1st St | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99352 | 303 Bradley Blvd | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 303 W Kennewick Ave | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99354 | 3051 Einstein Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 3180 W Clearwater Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 3311 W Clearwater Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 3321 W Kennewick Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 4 N Union St | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 500 N Morain St | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99352 | 503 Knight St | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 5204 W Clearwater Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 5219 W Clearwater Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 6515 W Clearwater Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 6855 W Clearwater Ave | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99352 | 690 Gage Blvd | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 7102 W Okanogan Pl | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 7103 W Grandridge Blvd | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 7301 W Deschutes Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 751 N Columbia Center Blvd | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 7601 W Clearwater Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 815 N Kellogg St | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 8203 W Quinault Ave | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 821 S Auburn St | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 8382 W Gage Blvd | -- | Get Directions |
| Public Collection Box | RICHLAND, WA 99352 | 888 Swift Blvd | -- | Get Directions |
| Public Collection Box | KENNEWICK, WA 99336 | 901 N Colorado St | -- | Get Directions |
