The life satisfaction and happiness index for the E.U. member states and candidate countries gives the following rankings, from most happy and satisfied to least happy and least satisfied:

1. Denmark
2. Sweden
3. Finland
4. Norway
5. Netherlands
6. Luxembourg
7. Ireland
8. Malta
9. Belgium
10. United Kingdom
11. France
12. Spain
13. Slovenia
14. Germany
15. Cyprus
16. Poland
17. Austria
18. Slovakia
19. Estonia
20. Czech Republic
21. Greece
22. Italy
23. Romania
24. Croatia
25. Lithuania
26. Portugal
27. Turkey
28. Latvia
29. Hungary
30. FYR Macedonia
31. Bulgaria

Read more, about household income by country, trust in people and trust in political institutions, by country, etc. here.
via: [1] and [2].