Kevin Halverson was ordered to spend 90 days in the Minidoka County Jail, during an appearance before Fifth District Judge Robert Elgee.
Halverson pleaded guilty July 30 to felony misuse of public funds. He admitted using a county gas card to purchase fuel for his personal use.
As part of his plea agreement with the state, Halvorson resigned his position on July 1.
Because of his conviction, Halvorson is prohibited from holding any public office in Idaho.
Elgee granted Halvorson a withheld judgement. If he satisfactorily completes his sentence and three years of probation, Halvorson can ask the court to dismiss the charges against him.
The Idaho Attorney General's Office investigated the case. Deputy Attorney General Jason Spillman prosecuted the case.
Minidoka County Prosecutor Lance Stevenson asked Attorney General Lawrence Wasden's office to investigate Halverson's gas purchases when bills charged with his card appeared unusually high.
Prosecutors claimed Halverson used the card to buy gas between November 2012 and January of this year for a woman who worked at the county.
The employee, driver's license clerk Alice Daniel, is charged with falsifying her time cards and misusing sick leave, costing the county just over $2,000. She has not entered a plea.
Charging documents alleged Daniel and Halverson were having a personal relationship and that she took some sick days and claimed work hours for time she spent with Halverson.
When he was first confronted, Halverson denied making personal purchases with the card.