EU population approx 500 million on 1.1.2009

According to Eurostat first 2008 demographic estimate for 2008 (published: Dec. 15, 2009)

EU pop 1.1. 2008: 497,455,000
+
Natural Change 555,800
+
Net Immigration 1,662,5000
=
499,673,300 on 1.1.2009

The corresponding numbers for the Eurozone (16 of the 27 member states of the EU)

1.1.2008 326,921,100
+
Natural Change 378,200
+
Net Immigration 1,298,100
=
328,597,300

(Note for comparisons: The US population is around 300,000,000)