WASHINGTON — Employers feeling upbeat about the economy boosted hiring by 211,000 in a springtime burst that pushed the unemployment rate down to 4.7 percent, matching its lowest point in 4½ years.

The employment picture for March, released by the Labor Department on Friday, suggested that a strengthening economic expansion is putting companies in the hiring mood and brightening prospects for job seekers.

Hiring gains were fairly widespread. Construction, retailers, financial activities, education and health care, and government were among the sectors posting payroll gains. That helped to blunt job losses in manufacturing and in the transportation industries.

“I think the job market is on a roll,” said Bill Cheney, chief economist at John Hancock Financial Services. “Businesses are doing pretty well these days. Profits are growing nicely. I think businesses are at a point where they feel more comfortable adding people.”

The unemployment rate, which dropped from February’s 4.8 percent, ended up matching January’s jobless rate.

For blacks, though, the unemployment rate didn’t budge; it held steady at 9.3 percent in March. The unemployment rate for Hispanics dipped to 5.4 percent last month and the jobless rate for whites edged down to 4 percent.

Overall employment was stronger in March than economists were expecting. They had forecast a gain of 190,000 jobs and believed the civilian jobless rate would hold steady.

The economy added 154,000 jobs in January and another 225,000 in February, according to revised figures released Friday. While job gains for each of those months turned out to be slightly less than previously reported, payroll growth for the January-to-March quarter as a whole was brisk. Job growth over the first three months of this year averaged 197,000.

Employees’ average hourly earnings, meanwhile, were $16.49 in March, a modest 0.2 percent increase from February — less than economists were expecting.

With the economy growing nicely and the job market blooming, the Federal Reserve and other economists are keeping a close eye on wage growth.

Wage improvement is good for workers, but a rapid, sustained acceleration would trigger inflation concerns.

Fed Chairman Ben Bernanke and his colleagues boosted interest rates on March 28 to a five-year high and hinted that additional increases were possible to keep inflation at bay. Economists predict rates will go up again on May 10.

Wages trailed inflation for most workers last year. For the 12 months ending March, wages were up 3.4 percent. That suggests “workers’ paychecks are now keeping even with inflation,” said Lynn Reaser, chief economist at Bank of America’s Investment Strategies Group.

Economists said the improving job market should help support consumer spending — an important ingredient to the economy’s good health. That’s against the negative force of a slowing housing market, which could make some people feel less wealthy and thus less inclined to spend.

The employment figures for March come against the backdrop of a rebounding economy. Analysts believe the economy emerged from an end-of-year funk and grew at an annual rate of 4.5 percent or higher in the just ended January-to-March quarter. The economy is expected to moderate in the current April-to-June quarter but still turn in a solid performance.