In its statement, the Fed noted that the U.S. job market has improved, consumer spending and business investment have increased and the housing market has strengthened. But its latest economic forecasts, also released Wednesday, show that the Fed still doesn't expect unemployment to reach 6.5 percent until 2015.
The Fed also cautioned that government spending cuts and tax increases could slow the economy. It predicts that growth won't exceed 2.8 percent this year, slightly lower than its December forecast of 3 percent.
A total of 13 Fed officials still think the first rate increase won't occur until 2015, the same number that thought so in December. One Fed official thinks the first boost in the short-term lending rate won't occur until 2016.
The statement was approved on an 11-1 vote.
Esther George, president of the Kansas City regional Fed bank, dissented for a second straight meeting. She reiterated her concerns that the Fed's aggressive stimulus could heighten the risk of inflation and financial instability — a concern shared by other critics.
Some economists say they fear the Fed has pumped so much money into the financial system that it could eventually ignite inflation, fuel speculative asset bubbles or destabilize markets once the Fed has to start raising rates or unloading its record $3 trillion investment portfolio.
And while the Fed's low interest-rate policies are intended to boost borrowing, spending and stock prices, they also hurt millions of retirees and others who depend on income from savings.
"Things are not going to get better for savers," said Greg McBride, senior financial analyst at Bankrate.com. "Rates are going to stay low for borrowers, and the Fed's accommodation will continue to be a positive for the stock market. Right now, the market is addicted to Fed stimulus."
Jim O'Sullivan, chief U.S. economist at High Frequency Economics, said the Fed appears focused on "whether recent improvement continues, and no changes to the (bond) purchase program appear imminent."