Apple iPhone Tops Mobile Phone Industry in the U.S.

If you live in the U.S. and own a mobile phone, it’s most likely an iPhone, according to a new study conducted by Nielsen. From January through October of this year, Apple’s (s aapl) little wonder device was the most popular phone in the country.

It beat the BlackBerry 8300 (Curve) (s rimm), which came in at No. 2. BlackBerry’s cumulative share still exceeds the iPhone’s, however, as the touchscreen Storm and entry-level Pearl also placed quite high on the list. Coming in at No. 3 was Motorola’s (s mot) RAZR V3, despite its considerable age and lack of smartphone features.

By the numbers, the iPhone 3G took 4 percent of cell-phone ownership in the U.S. (it’s unclear how previous models and the 3GS fit into this breakdown), while the Curve had 3.7 percent. The gap was wider between the second- and third-place finishers, with the RAZR taking only 2.3 percent. Meanwhile LG had a strong showing, with four handsets appearing in the top 10, and a cumulative market share of 6.4 percent.

As to web activity on cell phones, Google (s goog) topped the list of sites accessed via a mobile device, and competitor Yahoo (s yhoo) came in second with its Yahoo Mail site. Gmail came in third, and YouTube won out in terms of destinations for mobile video, making it a very solid year for Google in terms of the mobile web.

Notably, no Android devices made the top 10 list of popular devices, but Motorola’s Droid arrived late to the game. Expect to see it, or possibly the Nexus One, somewhere on this list in 2010.