| population | |
| City of Centralia | 16336 |
| City of Chehalis | 7259 |
| City of Morton | 1126 |
| population | |
| City of Mossyrock | 759 |
| City of Napavine | 1766 |
| City of Toledo | 725 |
| population | |
| City of Vader | 621 |
| City of Winlock | 1339 |
| Town of Pe Ell | 632 |
 | Ed Carlson Memorial Field South Lewis County Airport | ~ 33.56 km |
| Chehalis Centralia Airport | ~ 46.43 km |
| Gray Army Air Field | ~ 57.58 km |
| Olympia Regional Airport | ~ 58.38 km |
| McChord Air Force Base | ~ 62.59 km |
| Southwest Washington Regional Airport | ~ 64.18 km |
| Tacoma Narrows Airport | ~ 78.03 km |
| Sanderson Field | ~ 92.81 km |
| Seattle–Tacoma International Airport | ~ 97.09 km |
