The currency union is currently enjoying its strongest growth spell since the first half of 2011, as data compiler Markit said its Composite Output index signaled output growth for the ninth successive month in March at 53.1.
Although the headline output index was lower than February's 53.3 and the earlier flash estimate of 53.2, it remained consistent with Markit's forecasts for a 0.5 percent increase in GDP for the first quarter as a whole, improving on the 0.3 percent registered in the final quarter of 2013.
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After Ireland, Germany was in second position overall despite seeing its rate of growth ease to a five-month low, down from February's 32-month high of 55.9 to 53.0.
France was a big mover in March, posting the fastest rate of expansion since January 2012 and marking the first time since October that the index has risen above the 50 mark in the country, dividing expansions in activity from contractions.
"The final PMI data for March round off the region's best quarter for three years, with the survey data signaling that the economy grew by 0.5 percent compared to the fourth quarter," said Chris Williamson, chief economist at Markit.
"It is reassuring to see services growing at the fastest rate since the first half of 2011, as this provides further signs that domestic demand is reviving," he said.
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The region saw new orders rising and a slight accumulation of backlogs of work during March. Employment has remained steady in each of the past four months and March saw further job creation in Germany and Ireland.
France enjoyed a notable shift closer to stabilization in employment following a run of job losses that started in November last year.