comScore has released a report raking the top 50 web properties in the United States for February 2012. The data, gathered from the comScore Media Metrix service, shows some of the trends in web traffic during February.

Not surprisingly, Google, Microsoft, and Yahoo! retained the top three spots. Google has 186.6 million visitors to its various sites in February, while Microsoft had 174.4 million, and Yahoo! sat in a close third with 173.5 million. Facebook was in fourth place with 158.7 million. Twitter was squarely in the middle of the pack, ranking 25th with 38.4 million. With tax time approaching, the IRS’s website made the list for February at 43rd place with 25 million. Check out the full list below:

February also saw surges in certain kinds of traffic. Traffic to the IRS’s website grew by 54% from January to February. During the same time frame, overall traffic to tax-related websites grew by 48%, a trend that is likely to continue until April. Meanwhile, the Super Bowl and Valentine’s Day drove traffic surges as well. Traffic to flower and gift sites grew by 28%, while e-card services saw a jump of 13%. The Super Bowl was especially kind to auto makers, who saw a spike in traffic of 17% thanks to their numerous Super Bowl ads.

The full study can be downloaded from comScore.