993
- 99301 Pasco
- 99320 Benton City
- 99321 Beverly
- 99322 Bickleton
- 99323 Burbank
- 99324 College Place
- 99326 Connell
- 99328 Dayton
- 99329 Dixie
- 99330 Eltopia
- 99333 Hooper
- 99335 Kahlotus
- 99336 Kennewick
- 99337 Kennewick
- 99338 Kennewick
- 99341 Lind
- 99343 Mesa
- 99344 Othello
- 99345 Paterson
- 99346 Plymouth
- 99347 Pomeroy
- 99348 Prescott
- 99349 Mattawa
- 99350 Prosser
- 99352 Richland
- 99353 West Richland
- 99354 Richland
- 99356 Roosevelt
- 99357 Royal City
- 99359 Starbuck
- 99360 Touchet
- 99361 Waitsburg
- 99362 Walla Walla
- 99363 Wallula
- 99371 Washtucna