Schedule a Vaccine Appointment Online or Walk In

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COVID-19 Vaccination Clinic Hours for Walk-ins & Appointments

Loudoun County is now offering walk-in service at the COVID-19 vaccination clinic, located at Dulles Town Center, 21090 Dulles Town Circle in Sterling. Individuals 12 years and older are eligible for vaccination on a first-come, first-served basis during the COVID-19 vaccination clinic’s scheduled hours of operation; no appointment is necessary.

June 14 – June 19

  • Monday: 9:30 a.m. – 3:30 p.m.
  • Tuesday: 1:30 – 7:30 p.m.
  • Saturday: 9:30 a.m. – 12:30 p.m.

Closed: Friday, June 18, 2021 

June 21 – 22

  • Monday,  9:30 a.m. – 3:30 p.m.
  • Tuesday, 1:30 p.m. – 8:00 p.m.

June 23 and beyond:

  • Tuesdays: 3:00 – 6:30 p.m. 
  • Friday: 9:30 a.m. – 3:30 p.m.
  • Saturday: 9:30 a.m. – 12:00 p.m.

Closed: Saturday, July 3, 2021

Make an Appointment

STEP 1: Schedule your appointment.

  • Schedule an appointment now. 
    • Individuals ages 12+ are eligible at this time. Individuals 12-17 must choose an appointment labeled Pfizer. 
    • Use zip code 20166 when searching for the Loudoun County Health Department vaccination site located at Dulles Town Center.


  • Phone:  If you do not have access to the internet, you may call the COVID-19 Information Line at 703-737-8300 Monday -Friday from 9:00 a.m. - 5:00 p.m. to be scheduled by phone.

STEP 2:  Prepare for Your Appointment at the Loudoun County Vaccination Site

STEP 3: Schedule Your Second Dose

  • The Pfizer and Moderna vaccines require two doses, 21 or 28 days apart, respectively. It's important you get both doses. 
  • You do not need to re-register or wait for notification to schedule your second dose. 
  • If you scheduled your vaccine appointment over the phone, be sure to schedule your second dose appointment before you leave the vaccination site by visiting the assigned table near the exit. 
  • If you scheduled your vaccine appointment online, log back into your VAMS (Vaccine Administration Management System) account to schedule your second dose appointment.

Other Vaccination Opportunities

These entities do not coordinate their registrations with the Health Department.

  • - Look for available vaccination appointments at pharmacies and other locations in the region.
  • Community Vaccination Events - These events are being held throughout the county in June, July and August 2021. 

More Vaccine Information

  1. Receive updates from Loudoun County

    Contact us with Questions

    • Email the Loudoun County Health Department 
    • Call the Health Department's COVID-19 information line:  703-737-8300
      • Monday-Friday, 9:00 a.m. to 5:00 p.m.
    • Call the Virginia Department of Health’s COVID-19 hotline: 877-VAX-IN-VA (877-829-4682) 
      • Monday-Saturday, 8:00 a.m. - 6:00 p.m.