Founded in 1810, Washington County is one of 14 counties in the state of Vermont. Historically, Washington County was formed from parts of Orange County, Caledonia County, and Chittenden County. The city of Montpelier is the county seat. With FIPS code of 23, Washington County has a population of 59,969 and area of 690 square miles (1,787 km2).
List of all cities in Washington County, VT alphabetically
| City/Town | Postal Code | Area Code |
| Adamant, VT | 05640 | 802 |
| Barre, VT | 05641 | 802 |
| Barre Junction, VT | 05641 | 802 |
| Berlin, VT | 05602 | 802 |
| 05641 | 802 | |
| Bliss Pond, VT | 05640 | 802 |
| Bolton, VT | 05676 | 802 |
| Boutswells, VT | 05641 | 802 |
| Cabot, VT | 05647 | 802 |
| Calais, VT | 05648 | 802 |
| Colbyville, VT | 05676 | 802 |
| Dept Motor Vehicles, VT | 05603 | 802 |
| Duxbury, VT | 05676 | 802 |
| East Barre, VT | 05649 | 802 |
| East Cabot, VT | 05647 | 802 |
| East Calais, VT | 05640 | 802 |
| 05650 | 802 | |
| East Hill, VT | 05641 | 802 |
| East Montpelier, VT | 05651 | 802 |
| East Montpelier Center, VT | 05602 | 802 |
| East Warren, VT | 05674 | 802 |
| Fayston, VT | 05673 | 802 |
| Gould Hill, VT | 05602 | 802 |
| Graniteville, VT | 05654 | 802 |
| Irasville, VT | 05673 | 802 |
| Jones Brook, VT | 05602 | 802 |
| Lake Valley, VT | 05681 | 802 |
| Lower Cabot, VT | 05658 | 802 |
| Lower Websterville, VT | 05641 | 802 |
| Mad River Glen, VT | 05673 | 802 |
| Marshfield, VT | 05658 | 802 |
| Middlesex, VT | 05602 | 802 |
| Middlesex Center, VT | 05602 | 802 |
| Montpelier, VT | 05601 | 802 |
| 05602 | 802 | |
| 05603 | 802 | |
| 05604 | 802 | |
| 05609 | 802 | |
| 05620 | 802 | |
| 05633 | 802 | |
| Montpelier Junction, VT | 05602 | 802 |
| Moretown, VT | 05660 | 802 |
| National Life Ins, VT | 05604 | 802 |
| North Calais, VT | 05650 | 802 |
| North Duxbury, VT | 05676 | 802 |
| North Fayston, VT | 05660 | 802 |
| North Middlesex, VT | 05682 | 802 |
| North Montpelier, VT | 05666 | 802 |
| Northfield, VT | 05663 | 802 |
| Northfield Falls, VT | 05664 | 802 |
| Northfield Fl, VT | 05664 | 802 |
| Northfld Falls, VT | 05664 | 802 |
| Norwich University, VT | 05663 | 802 |
| Orange, VT | 05641 | 802 |
| Pekin, VT | 05667 | 802 |
| Plainfield, VT | 05667 | 802 |
| Riverton, VT | 05663 | 802 |
| South Barre, VT | 05670 | 802 |
| South Duxbury, VT | 05660 | 802 |
| South Woodbury, VT | 05650 | 802 |
| State of Vermont, VT | 05609 | 802 |
| 05620 | 802 | |
| 05633 | 802 | |
| 05671 | 802 | |
| Sugarbush Valley, VT | 05674 | 802 |
| Trow Hill, VT | 05641 | 802 |
| Waitsfield, VT | 05673 | 802 |
| Waitsfield Common, VT | 05673 | 802 |
| Warren, VT | 05674 | 802 |
| Waterbury, VT | 05671 | 802 |
| 05676 | 802 | |
| Waterbury Center, VT | 05677 | 802 |
| Websterville, VT | 05678 | 802 |
| West Berlin, VT | 05663 | 802 |
| Woodbury, VT | 05681 | 802 |
| Worcester, VT | 05682 | 802 |