The Sullivan Treasurer's Office is currently open. We request that you make an appointment to come in to our office. You may walk in at any time during business hours to come in our office, but those with scheduled appointments take priority. Please call (845) 807-0200 to make an appointment.
If you are making a payment by check or money order, there is a secure drop-box available at both entrances to the Government Center which is checked twice daily. You may also mail payments to: Sullivan County Treasurer, 100 North Street, PO Box 5012, Monticello, NY 12701. Envelopes postmarked by the US Postal Service are accepted as timely for regular property tax payments.