The Seattle-based company's HQ2 project expected to cost more than $5 billion and create 50,000 high-paying jobs over the next 10 to 15 years.
"Way to go #Indy! Indianapolis named to @amazon's shortlist for its HQ2! Further proof our city is one of the nation's leading innovation centers," tweeted U.S. Rep. Andre Carson, D-7th District.
And Indianapolis Mayor Joe Hogsett tweeted that the central Indiana region's "unique combination of connectivity, quality of life, and affordable living has once again put us on the global stage."
Indy Chamber did much of the organization and hard work of the city's bid and the group was retweeting posts about the news on Thursday morning.
And they were receiving congratulatory tweets as well. "Seriously, everyone applaud the team over at @IndyChamber for this one," said Justin Harter, a writer and developer.
U.S. Todd Young, R-Indiana, called Indiana "the best place to start, locate, or grow a business."
Molly Martin, director of New America Indianapolis, part of a network of think tanks examining technology and its impact on American ideals, challenged Indy residents to think about the question: What three issues do you think the city must tackle were we to land it?
Freelance journalist Adam Wren urged Amazon to go ahead and "proceed to checkout" by picking Indianapolis.