Vigo County, In. – Vigo County property tax bills are officially in the mail, and taxpayers are reminded that the spring installment is due by Monday, May 11th. Residents can pay online at the county website, by phone, or in person at the Vigo County Annex 24-hour drop box. Payments are also being accepted at several local bank branches, including First Financial, Old National, and The Hometown Savings Bank. If you are mailing your payment, officials recommend getting it hand-stamped at the post office by the deadline to ensure it is processed on time and to avoid late penalties.