A new survey on Cars.com showed that 59 percent of car shoppers have purchased or would considering purchasing a hybrid as their next car.

The survey found that most of the searches on Cars.com for hybrid vehicles come from the West Coast -- topped by the San Francisco Bay Area, at 5.6 percent of all new car searches.

The Cars.com Green Index monitors hybrid vehicle interest in the 50 largest markets in the country. Rankings are calculated based on the number of hybrid searches in a market as a percentage of all new-car searches in the market.

"Gas prices definitely play a role in hybrid interest, because West Coast cities traditionally have higher gas prices on average than the rest of the country," said Cars.com editor in chief Patrick Olsen. "The Cars.com Green Index also shows that interest is high in markets that are traditionally concerned with environmental issues, such as Denver and Minneapolis, and those plagued by traffic and congestion, such as Washington, D.C., and Boston."

The other cities in the top five are: Portland, Ore.; Seattle; Sacramento, Calif.; and San Diego. Click here to see the complete list.

In the top 13 markets in the survey, hybrids account for more than 3 percent of new car searches on Cars.com. While West Coast cities seem to embrace hybrid vehicles more than their counterparts in the Midwest and on the East Coast, cities in the South lag behind most major cities in the country, with Houston, Oklahoma City, Memphis, Birmingham and Miami rounding out the bottom five.