zillow-photoZillow continues to fire on all cylinders, bolstered by an improving economy in which Americans are thinking more about buying and selling homes.

The Seattle company announced today that its unique visitor count for the month of January hit 69.8 million — a huge uptick from 52.1 million visitors in the month prior. It was also a 52 percent increase over the same period last year.

zillow-traffic55Just how much has Zillow grown over the years? Consider this: In January 2010, the company recorded 8.9 million visitors.

The increase in traffic came, even though Zillow — which has been engaged in a multi-million dollar national ad campaign — spent lightly on advertising during the month.

“Zillow grew web visits 30 percent (year-over-year) in the month, while our two closest competitors recorded 10 percent decreases,” said a spokeswoman, citing data from Experian Marketing Services. “On mobile web, Zillow was 2.5x and 4x the size of our two closest competitors based on market share of visits.”

Zillow plans to report Q4 financial results on Feb. 12. The stock gained seven percent today, trading at $84.45. It is up 128 percent over the past 12 months, now showing a $3.3 billion market value.

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