The German driver, who left his twenties behind on Saturday, repeated his 2014 success when he came home a comfortable 3.8 seconds clear of the defending world champion and reduced his lead from 17 points to 10.
After eight of this year's 19 races, Briton Hamilton, who picked up a five seconds penalty in the race, has 169 and Rosberg, who won last year's Austrian event, 159. It was Rosberg's third win of the season and the 11th of his career.
Venezuelan Pastor Maldonado was seventh for Lotus ahead of Dutch teenager Max Verstappen of Toro Rosso, Mexican Sergio Perez in the second Force India and Australian Daniel Ricciardo, who picked up a point for Red Bull, after starting down the grid.
The race began with drama as Rosberg sped into a first corner lead and almost immediately a spectacular collision between two-time champion Fernando Alonso and 2007 champion Kimi Raikkonen caused the race to be halted with the introduction of a safety car.
It was another hugely disappointing day for the struggling McLaren-Honda team. On top of Alonso's first lap crash, Briton Jenson Button had to make an early retirement in the other car with engine problems.
In dry and mild conditions in the Styrian Alps, Rosberg made a perfect start as the lights went out, drawing alongside pole-sitter Hamilton to take the lead at the first corner.
The world champion attempted to re-gain the lead at the next two turns, but Rosberg defended adroitly while, behind them, a serious collision involving Raikkonen and Alonso caused the race to be stopped and run behind the safety car until the debris was cleared.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
