The new board members were elected in December by the San Juan County Fair Association.
They replace Crystal Tafoya, Kelly Echols and Tom Roberts, who did not run for re-election.
Board president Ben Hazelwood retained his seat.
The fair is held in August each year and attracts more than 90,000 attendees annually.
"It is the largest single county fair in the state of New Mexico," Nobis said.
The four newly elected members join Billy Huish, Darrin Church, Shanna Webb, Blaine Williams, Brian Perry, David Stark, Gwen Gonser, Kim Martinez and Lucille Jones on the board.
Officers for 2013 will be elected at the board's next meeting, which is 7 p.m. Tuesday at McGee Park. The meetings are open to the public and members of the fair association are encouraged to attend.
Fair officials are planning for the 2013 event, set for Aug. 5-10 at McGee Park. A contest will be held at a later date to determine the fair's theme.
"The fair board usually takes a couple of weeks after the fair to regroup and rest up," Huish said in a prepared statement. "Then we head to Las Vegas, Nev., in November for a fair expo and look for entertainment for the next fair. We always want to have the next fair better than the last fair."
Board members are considering entertainers for the 2013 fair.
"There are some pretty big names being tossed around, but none of that is finalized," said Nobis.
Nobis has been a volunteer for the fair, assisting with media and public relations, for some 20 years.
Rielley previously served on the board for nine years and has been involved with the fair since 1966.
Wages' three daughters have been showing animals at the fair for the last 15 years.
Hazelwood has served on the board for the past five years and grew up participating in 4-H Clubs and Future Farmers of America.