| Cities | Population |
| Monongahela | 4,149 |
| Washington | 13,179 |
| Allenport | 1950 |
| Beallsville | 392 |
| Bentleyville | 2,349 |
| Burgettstown | 1,424 |
| California | 5,479 |
| Canonsburg | 9,735 |
| Centerville | 3,254 |
| Charleroi | 4,210 |
| Commissioner | Maggi, Larry |
| Commissioner | Irey-Vaughan, Diana |
| Commissioner | Sherman, Nick |
| President | Mrs. Tara Sparks-Gatling |
| Vice President | Mrs. Amy Roberts |
| Treasurer | Mrs. Marsha Pleta |
| School Board Member | Mrs. Rhonda Barnes |
| School Board Member | Mr. John Campbell |
| School Board Member | Mrs. Jennifer Ewing |
| School Board Member | Mrs. Kimberly Kelley |
| School Board Member | Dr. Dana Shiller |
| School Board Member | Ms. Jenna Ward |
The County of Washington is governed by a three-member publicly elected commission. The three commissioners serve in both executive and legislative capacities. By state law, the commission must have a minority party guaranteeing a political split on the commission. Each term is for four years.
The three current commissioners for Washington County are Lawrence Maggi (Democrat), Diana Irey (Republican), and Nick Sherman (Republican).
Maggi was the Democratic nominee for Pennsylvania's 18th congressional district against Republican incumbent Tim Murphy in 2012. Maggi lost to Murphy and earned only 36 percent of the vote. Irey was the Republican candidate for Pennsylvania's 12th congressional district and lost to the late Democratic incumbent John Murtha in the 2006 election.
