The Washington Monument is free, but does require a ticket. The ticket kiosk for the monument, located at the base of the monument on 15th street opens at 8:30 am to distribute free tickets on a first come first serve basis. One person may pick up to six tickets maximum. All individuals (including children must have a ticket). During the spring and summer, tickets traditionally go very quickly for the entire day. The line for tickets have started as early as 7:30 am, please plan accordingly.
If you care to reserve a ticket(s) in advance you may do so by going to either visiting the National Park Service ticketing website http://www.reservation.gov
or by calling 1.877.444.6777, for group reservations only call 1.877.559.6777. There is a $1.50 fee per order to reserve tickets ahead of time. These tickets may be picked up at the “will call” window of the monument ticket kiosk the day of your tour.