| Business | Phone |
| Trinity Area School District 231 Park Ave, Washington 15301 | (724) 225-9880 |
| Trinity High School 231 Park Ave, Washington 15301 | (724) 225-5380 |
| Trinity Middle School 50 Scenic Dr, Washington 15301 | (724) 228-2112 |
| Trinity North School 225 Midland Dr, Washington 15301 | (724) 222-5064 |
| Trinity School East 252 Cameron Rd, Washington 15301 | (724) 225-8140 |
| Trinity South Elementary Schl 2500 S Main Street Ext, Washington 15301 | (724) 225-7490 |
| Trinity West Elementary School 1041 Gabby Ave, Washington 15301 | (724) 222-4730 |
| Walker Elementary School 2510 Park Ave, Washington 15301 | (724) 222-3061 |
| Washington County Alternative 1099 Allison Ave, Washington 15301 | (724) 225-5505 |
| Washington County Daycare 100 W Beau St # 404, Washington 15301 | (724) 228-6969 |
| Washington High School 201 Allison Ave, Washington 15301 | (724) 223-5085 |
| Washington Middle School 801 E Wheeling St, Washington 15301 | (724) 223-5000 |
| Washington School District 201 Allison Ave # 2, Washington 15301 | (724) 223-5018 |
| Washington School District Adm 201 Allison Ave, Washington 15301 | (724) 223-5010 |
| Skill Builders Inc Route 519, Washington 15301 | (724) 228-4629 |
| Intermediate Unit 801 E Wheeling St, Washington 15301 | (724) 222-2744 |
| Intermediate Unit I Lab School 99 Manse St, Washington 15301 | (724) 222-1040 |
| John F Kennedy Grade School 111 W Spruce St, Washington 15301 | (724) 225-1680 |
| Joyce Ellis Dancers 36 W Chestnut St, Washington 15301 | (724) 228-8177 |
| First Love Christian Academy Washington 15301 | (724) 225-3522 |
| Child Alert 615 E Beau St, Washington 15301 | (724) 225-0622 |