Texas led installations for the fourth quarter with 1.8GW, followed by Iowa, South Dakota, North Dakota, and Illinois.
The record for annual installations was set in 2013, when 13.3GW was added, followed by the just-over-10GW put in in 2009. More than 7.5GW of new wind capacity was installed in 2018.
There is now 105,583MW of operating wind capacity in the US.
As of the end of 2019, AWEA said 44GW of wind projects — representing more than $62 billion in investment — were under construction or in advanced development with either an offtake agreement or ownership by a utility.
The pipeline of wind farm construction and advanced development was up 24% year on year, compared with 2018, said AWEA.
This was buoyed by utilities and businesses announcing 8.7GW in power purchase agreements in 2019.
The nascent offshore market also continues to look set to flourish, with east coast state governments driving demand with 16 GW in new offshore wind targets pledged in 2019 — more than doubling previous state targets.
"Demand for wind energy is greater than ever as evidenced by corporations and utilities signing contracts in record numbers," said AWEA's CEO, Tom Kiernan.
"Nearly 200 projects are underway in 33 states, from the wind belt in America's heartland to the booming offshore wind market, where visionary leaders are leveraging the affordable, clean energy that wind provides," he concluded.