WASHINGTON — Retail sales plunged far more than expected in December, a record sixth straight monthly decline as consumers were battered by a recession, a severe credit crisis and soaring job losses, none of which are likely to ease anytime soon.

The Commerce Department reported Wednesday that retail sales dropped 2.7 percent last month, more than double the 1.2 percent decline that Wall Street expected.

For the entire year, retail sales were down 0.1 percent, a sharp turnaround after a 4.1 percent gain in 2007. It was the first time the annual retail sales figure has fallen on government records going back to 1992. Before 2008, the weakest year for retail sales had been an increase of 2.4 percent in 2002, the year after the 2001 recession.

The weakness in consumer spending has been a prime contributing factor to the economy's current swoon and analysts say they don't see that turning around soon. They predict the current recession, already the longest in a quarter-century, will continue at least until the second half of this year.

The 2.7 percent December plunge in sales, which followed a November drop revised upward to 2.1 percent, confirmed private sector reports that retailers had suffered their worst holiday shopping season since at least 1969.

Since consumer spending accounts for about two-thirds of total economic activity, the weakness is a major factor depressing overall economic activity. The country fell into a recession in December 2007, reflecting a severe slump in housing.

The economy's weakness intensified in the fall when the financial system was engulfed in its biggest crisis since the 1930s as billions of dollars of losses on mortgages and other types of loans forced the government to put together a massive rescue effort to try to get banks to resume more normal lending.

President-elect Barack Obama has promised to push a sweeping economic stimulus program of around $800 billion through Congress in the next few weeks, but even with that assistance, economists say the country is facing a prolonged period of weakness.

Many analysts believe the overall economy, as measured by the gross domestic product, plunged at an annual rate of 6 percent in the just-completed fourth quarter after dropping by 0.5 percent in the third quarter.

For December, virtually all areas of retail sales showed declines. Auto sales fell by 0.7 percent and are down a huge 22.4 percent from a year ago.