Economists had forecast that the business barometer fell to 54 from 56.8 during the month, according to Bloomberg. It remained above 50, the border between expansion and contraction.
After a surge in June, new orders and production fell a bit in July.
"On the upside, it was the first time since January 2015 that all five barometer components were above 50," said Lorena Castellanos, a senior economist at MNI Indicators.
"Another positive came from the Employment Indicator. Although it's still relatively weak, should July's increase hold then it could be read as a tentative sign of growing business confidence about economic growth ahead," she said.
Last month, the index rose to its highest level since January 201. Businesses also ended a seven-month run in contracting inventories.