HONG KONG—It now takes Macau's gamblers just one day to wager what's bet in an entire week on the Las Vegas Strip.

Gambling revenue in Macau rose 19% last year, further cementing the Chinese territory's position as the world's casino capital.

Analysts expect Macau, the only place in China where casino gambling is legal, to widen its lead this year on the Las Vegas Strip, whose revenue was likely only about one-seventh of Macau's in 2013. Deutsche Bank analyst Karen Tang forecasts the territory's gambling revenue will grow by 20% in 2014. Aaron Fischer, an analyst at brokerage CLSA, predicts it will hit $77 billion by 2017.

That compares with 360.7 billion patacas ($45.2 billion) in 2013. December's revenue totaled 33.46 billion patacas, also up 19% year to year, according to data from Macau's Gaming Inspection and Coordination Bureau. In 2012, Macau's gambling revenue rose 14%.

Investors in Macau casino stocks have profited handsomely thanks to the tremendous growth. Over the past year, top performers included Nasdaq-listed Melco Crown Entertainment Ltd. as well as Hong Kong-listed MGM China Holdings Ltd. and Galaxy Entertainment Group Ltd., whose share prices all more than doubled.