Four years ago, 93.4 percent of Sonoma County voters cast ballots in the presidential election, tops among California's 58 counties.

Although most of the numbers weren't as lofty, voter turnout was up throughout the state and across the country.

This year, conventional wisdom says voters aren't as enthusiastic about their choices for president, so fewer people will show up on Election Day.

In Sonoma County, however, voter registration is running ahead of 2008, with thousands of people signing up over the past month. If you aren't registered, and you want to vote in the Nov. 6 election, today is the deadline.

Voter registration cards are available at public libraries and many other government buildings. This year, for the first time, many people are eligible to register online.

As long as you have a California driver's license, you can do so here:

Sonoma County Clerk-Recorder Janice Atkinson said the online option has been a hit, accounting for nearly half of the registrations delivered to her office in the weeks after the system went into effect.

Atkinson said "small surges" followed debates between President Barack Obama and challenger Mitt Romney and Vice President Joe Biden and challenger Paul Ryan.

It's too late for another such surge, but the third and final presidential debate is at 6 p.m. today in Boca Raton, Fla. It will be televised on most of the major broadcast and cable networks. We'll be watching, and we urge all voters to tune in as Obama and Romney answer questions about foreign policy.

There may not be much suspense about how California will vote for president, though the national outcome is far from decided. Besides, there's much more on the ballot: a U.S. Senate seat, a vacancy on the Sonoma County Board of Supervisors, spots on the city councils in seven of the county's nine cities and five area school boards. There also are ballot measures involving taxes, auto insurance, food labeling and criminal justice.

Make your voice count. Register and vote.