Fidelity is a village in Jersey County, Illinois, United States, located about thirty-five miles north of Saint Louis, Missouri.

In another version of events, Joseph Russell and his brother William were traveling from Hawkins County, TN, to Missouri.

William continued to St Louis, surveyed a tract of land, and went back to Tennessee.

On July 31, 1849, William wrote to Joseph about his intentions to name the town " Fidelity."

During the mid-20th century, Fidelity was reportedly the site of "a small Army barracks, grain elevator, several doctors and dentists, a blacksmith shop and grocery stores.

"[citation needed] Since then, Fidelity has become a tiny village made up mostly of small homes.

The post office is now the only remaining business and its postmark has enjoyed some popularity for use on Valentine's Day greetings, with several hundred requests for cancellations received from addresses both in the United States and around the world each year.