"The golden age of our economic relationship is right now," he said. "And we think it is going to get better as we go forward," Delaney told reporters in Colombo.
"We are the biggest customer of Sri Lankan exports, something we are proud of it.
"We are doing a lot now. There is also a lot more we can do. With the end of the war many, many trade and investment opportunities exist now that probably did not exist before."
He said Sri Lanka was starting up new projects including infrastructure where the US had expertise.
Delaney met representatives of the economic development ministry, department of commerce, the board of investment and the foreign ministry during a visit to the island.
Delaney said he had discussions about a workers rights petition over Generalised System of Preference (GSP) program.
"Over the past few years, we have had very useful and productive discussions with the Government and other Sri Lankan stakeholders on worker rights issues, including those raised in the petition," he said
"As you know, the GSP petition was one of the topics discussed during Foreign Minister Peiris’s visit to Washington last month."My visit here allowed me to follow up on those discussions and to learn more about what the Government and other stakeholders have done in recent months to improve the worker rights environment."
"We are pleased to note that there has been significant progress on several issues raised in the petition.
"For example, the Sri Lanka Board of Investment has established trade union facilitation centers in each of the three largest export processing zones – something the trade unions had sought."