Dublin school board incumbents Amy Miller, Dan Cunningham, and Greg Tomlinson were leading Tuesday in a close race for three board seats.

With votes in from all precincts, Austin Ogden, a June graduate of Dublin High School, was trailing in fourth place.

However, the Alameda County registrar of voters estimated Tuesday that about 25 percent of votes countywide may still be wating to be counted -- mailed-in ballots, and mail-in ballots dropped off at polling places Tuesday.

Miller collected nearly 27 percent of the vote, trailed by Cunningham with nearly 26 percent and then Tomlinson with 24.5 percent, according to unofficial elections results.

Ogden picked up 22.4 percent of the vote, officials reported.

Ogden was attempting to become one of the youngest school board members in California.

Ogden said the board needs someone with a student's point of view, and someone who went through the Dublin school system.

Tomlinson, Miller and Cunningham, said they should be returned to office because school district achievement test scores have improved for several years, and the district has avoided laying off teachers in a difficult financial time.

Ogden is a student at Diablo Valley College.

Tomlinson, elected to the board in 2008, is a construction finance specialist.

Cunningham, also elected to the board in 2008, runs a tax advice and accounting business.

Miller, appointed to the school board in 2010, is a former special events coordinator for Dublin Partners in Education, which raises money for the Dublin school system.

Contact Denis Cuff at 925-943-8267. Follow him at Twitter.com/deniscuff.