Ocasio-Cortez confirmed her appointment on Tuesday night on Twitter, saying: "Financial Services is one of just four exclusive committees in the House. It oversees big banks, lending, & the financial sector."
"I am very grateful for the opportunity to sit on this committee as a freshman, and look forward to working under the leadership of @RepMaxineWaters!" she added.
First-year members of Congress are rarely given places on high-ranking committees like this one.
The Financial Services Committee has formal responsibility to oversee the Federal Reserve and the Securities and Exchange Commission. It has regular opportunities to interrogate top US financial officials.
The committee was crucial in the formation of the Dodd-Frank package of laws which dramatically reformed the US financial sector in the wake of the 2008 financial crash, and is named after former chairman Barney Frank.
Ocasio-Cortez added: "Personally, I'm looking forward to digging into the student loan crisis, examining for-profit prisons/ICE detention, and exploring the development of public & postal banking. To start."
She is also expected to advocate for higher scrutiny of financial firms, Bloomberg reported . She has rejected corporate campaign donations and called for big banks to be broken up in the past.
Ocasio-Cortez's appointment comes after she was left off the House Ways and Means Committee , which oversees many parts of US economy policy including spending, taxes, and revenue.
House Speaker Nancy Pelosi's Steering and Policy Committee offered the spot on the committee to New York Rep. Tom Suozzi, a 56-year-old, more fiscally conservative, Democrat instead.
Two key parts of Ocasio-Cortez's platform ,Medicare for All and the "Green New Deal," would need the Ways and Means committee's approval to become law.
Hawaii Rep. Tulsi Gabbard, who is running for president in 2020 , is also expected to be given a place on the Financial Services committee, Bloomberg reported.
