Social Networking Stats: Facebook and LinkedIn Surging in US

The latest numbers are in, and they’re showing that June was a big month for at least two of the top social networking sites. According to Nielsen Online, Facebook swelled to 29.2M unique visitors in the US, up more than 10 percent from May. Meanwhile, professional social networking site LinkedIn grew more than 20 percent month-over-month to 9.5M uniques. Year-over-year, that represents 77% growth for Facebook, and 187% for LinkedIn, respectively.

Meanwhile, it would appear that MySpace has officially hit a plateau in the US, though it still more than doubles up on the competition. Its 59.4M visitors in June represented zero growth over last year, and was a marginal decline from the 60.6M reported by Nielsen in May.

Elsewhere, Ning debuts on the charts with 2.2MM unique visitors, up 326% from last year when the create-your-own-social-network site was just getting off the ground.

The top 20 chart is embedded after the jump.

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