Youth-oriented fashion retailer Urban Outfitters Inc has experienced a third quarter same-store sales increase of 17 per cent, compared to the same period last year.

The Philadelphia-based company, which also operates Anthropologie stores and the Free People wholesale division, reported a 29 per cent increase in total sales for the quarter from $110.1 million to $142.3m.

Chairman and president Richard Hayne said the increases were driven by strong apparel sales at Urban Outfitters and Anthropologie stores.

"Both retail brands produced their best 'comp' store sales during the quarter in October even though comparisons were the toughest," he said.

"This positive momentum bids well for the current quarter and we continue to be optimistic concerning the company's near and long term prospects."

Urban Outfitters operates 112 namesake and Anthropologie stores throughout the US, Canada and Europe.