A congressman’s son, a Rancho Santa Fe attorney and a retired Navy SEAL won the region’s congressional primary races Tuesday.

In the 52nd Congressional District, which includes Poway and Ramona, 31-year-old Marine Corps Reserve Capt. Duncan D. Hunter easily beat the other contenders on the Republican ballot. Hunter, whose father Duncan Hunter represents the district, had 72.5 percent of the votes with 100 percent of the ballots counted.

Trailing Hunter for the GOP nomination were Brian Jones with 16 percent, Bob Watkins with 8.2 percent and Rick Powell with slightly more than 3 percent.

“This is going to be dedicated to those men and women I served with in Iraq and their families back here, and all those people who are fighting for our freedom overseas,” Hunter told television station KUSI Tuesday night, before being declared the winner.

Of the two Democrats running in the 52nd Congressional District primary, retired Navy SEAL Mike Lumpkin won with 58.5 percent of the vote. His challenger, Vickie Butcher, wound up with 41.5 percent.

“We weren’t really too surprised by the difference,” Lumpkin’s campaign manager Chris Young said Tuesday night about the margin. “This is the first time that we’ve not only had an open seat, but a candidate who really resonates in the district. It’s very heartening. Everybody’s ready for a change and for a real patriot to go in and work for everybody.”

Libertarian Michael Benoit collected all of the 326 votes cast in the race.

In the 50th District primary race for Democrats, Nick Leibham, a Rancho Santa Fe attorney, beat Cheryl Ede, a Pacific Beach school psychologist, 57.3 percent to 42.7 percent.

Leibham will face U.S. Rep. Brian Bilbray, a Republican who ran unopposed in the district, which covers Escondido, San Marcos, Carlsbad, Encinitas and Solana Beach.

In the 49th Congressional District, U.S. Rep. Darrell Issa ran unopposed on the Republican ballot. Democrat Robert Hamilton, a retired businessman from Fallbrook, and Libertarian mortgage banker Lars Grossmith of Vista also ran unopposed.

The district covers Oceanside, Vista, Fallbrook and Temecula.

With 100 percent of the votes cast, Issa had 22,956 votes, while together his challengers had 12,234 votes.

In the 51th Congressional District, Democratic incumbent Bob Filner finished with 78.7 percent of the votes over challenger Daniel Ramirez.

Of the two Republicans on the ballot, David Lee Joy wound up with just under 63 percent of the votes. His opponent, Oceanside resident Dan Felzer, had slightly more than 37 percent of the vote.

The district covers Imperial County, San Diego’s South Bay and parts of San Diego north of National City.

In other races, State Sen. Tom McClintock led former Congressman Doug Ose in early returns Tuesday in a fierce, high-spending Republican primary contest in California’s far-flung 4th Congressional District.

With 5 percent of precincts reporting, McClintock had 53 percent of the vote and Ose had 39 percent.

The district that sprawls north and east from Sacramento is being vacated by GOP Rep. John Doolittle, who has been caught up in a federal lobbying scandal. His retirement at the end of the year is creating one of two open seats among California’s 53 House districts, with Hunter the second seat.

Ose, 52, is a real estate investor and developer who represented the neighboring 3rd Congressional District before retiring on a term-limits pledge in 2003. He said his background in business can help put the country back on track.

Ose spent nearly $3 million of his own money to rough up McClintock. He has called McClintock a carpetbagger who has spent his life living off taxpayers and is seeking the seat merely to maintain a career in elective office.

Ose said he spent more of his own money than he expected he would have to as McClintock outraised him 2-to-1 in the course of the campaign. He drew support from local elected officials and others, while McClintock’s more than $1 million in donations came from GOP activists around the country.

McClintock, 51, received additional help from the anti-tax Club for Growth and other groups that launched independent ad campaigns on his behalf. A conservative standard-bearer and career politician who is being forced from his Southern California state Senate seat by term limits, McClintock is a familiar face to California Republicans because of four failed statewide races —— including in the 2003 gubernatorial recall, where he finished third —— he is admired for his unyielding opposition to tax hikes.

McClintock focused his campaign on painting Ose as a big-government liberal.

Also in the GOP race are consultant Theodore Terbolizard and attorney Suzanne Jones.

The winner is expected to face Democrat Charlie Brown, a retired Air Force lieutenant colonel who came close to beating Doolittle in the 2006 general election, despite a heavy Republican registration edge in the 4th District. Brown was facing token opposition from Democrat John “Wolf” Wolfgram Tuesday.

Elsewhere, former state Sen. Jackie Speier was securing the Democratic nomination to compete for a full term in Northern California’s 12th district, where she won a special election in April to replace the late Rep. Tom Lantos, who died of cancer in February.

The 11th Congressional District straddling the Central Valley and the San Francisco Bay area is likely to present the most competitive general election contest in November but will be quiet Tuesday. Republican Dean Andal and Democratic incumbent Jerry McNerney were running unopposed in their party primaries. McNerney ousted a powerful GOP incumbent in 2006.

House Speaker Nancy Pelosi was facing token Democratic primary opposition in San Francisco’s 8th Congressional District from local activist Shirley Golub. Peace activist Cindy Sheehan is making plans to challenge Pelosi as an independent in November but will not be on the primary ballot.

Neither of California’s U.S. senators, Democrats Dianne Feinstein and Barbara Boxer, is up for re-election this year. Boxer’s seat is up in 2010.

The Associated Press contributed to this article.