According to Wikipedia:
City and country Population Date of census/estimate
1. London, UK 7,517,700 June 30, 2005 (official)
2. Berlin, Germany 3,399,511 June 30, 2006 (official)
3. Madrid, Spain 3,128,600 January 1, 2006 (official)
4. Rome, Italy 2,545,243 March 31, 2006 (official)
5. Paris, France 2,153,600 January 1, 2005 (official)
6. Bucharest, Romania 1,924,959 July 1, 2005 (official)
7. Hamburg, Germany 1,751,656 August 30, 2006 (official)
8. Warsaw, Poland 1,700,536 June 30, 2006 (official)
9. Budapest, Hungary 1,698,106 January 1, 2006 (official)
10. Vienna, Austria 1,660,534 October 1, 2006 (official)
11. Barcelona, Spain 1,605,602 January 1, 2006 (official)
12. Munich, Germany 1,325,697 November 30, 2006 (official)
13. Milan, Italy 1,305,808 March 31, 2006 (official)
14.Sofia, Bulgaria 1,246,791 September 15, 2006 (official)
15. Prague, Czech Rep. 1,186,618 September 30, 2006 (official)
16. Birmingham, UK 1,001,200 June 30, 2005 (official)
17. Cologne, Germany 986,168 June 30, 2006 (official)
18. Naples, Italy 981,353 March 31, 2006 (official)
19. Turin, Italy 898,979 March 31, 2006 (official)
20. Marseille, France 820,900 January 1, 2005 (official)
21. Valencia, Spain 805,304 January 1, 2006 (official)
22. Stockholm, Sweden 780,817 September 30, 2006 (official)
23. Łódź, Poland 767,628 December 31, 2005 (official)
24. Kraków, Poland 756,629 December 31, 2005 (official)
25. Athens, Greece 745,514 March 18, 2001 (official)
26. Amsterdam, Netherlands 743,393 December 31, 2005 (official)
27. Riga, Latvia 727,578 January 1, 2006 (official)
28. Sevilla, Spain 704,414 January 1, 2006 (official)
29. Palermo, Italy 668,843 March 31, 2006 (official)
30. Frankfurt, Germany 659,928 September 30, 2006 (official)
31. Zaragoza, Spain 649,181 January 1, 2006 (official)
32. Wrocław, Poland 635,932 December 31, 2005 (official)
33. Genoa, Italy 618,438 March 31, 2006 (official)
34. Stuttgart, Germany 591,528 April 30, 2006 (official)
35. Rotterdam, Netherlands 588,500 December 31, 2005 (official)
36. Dortmund, Germany 587,717 June 30, 2006 (official)
37. Essen, Germany 583,892 June 30, 2006 (official)
38. Glasgow, UK 578,790 June 30, 2005 (official)
39. Düsseldorf, Germany 575,727 June 30, 2006 (official)
40. Poznań, Poland 567,882 December 31, 2005 (official)
41. Helsinki, Finland 560,905 December 31, 2005 (official)
42. Málaga, Spain 560,631 January 1, 2006 (official)
43. Vilnius, Lithuania 553,553 January 1, 2006 (official)
44. Bremen, Germany 546,852 December 31, 2005 (official)
45. Lisbon, Portugal 529,485 2004 (official)
46. Sheffield, UK 520,700 June 30, 2005 (official)
47. Hannover, Germany 515,559 June 30, 2006 (official)
48. Dublin, Ireland 505,739 April 23, 2006 (official)
49. Leipzig, Germany 505,069 June 30, 2006 (official)
50. Copenhagen, Denmark 501,158 January 1, 2006 (official)
51. Duisburg, Germany 500,142 June 30, 2006 (official)
52. Dresden, Germany 500,068 June 30, 2006 (official)
53. Nuremberg, Germany 499,222 August 31, 2006 (official)
54. Gothenburg, Sweden 489,425 September 30, 2006 (official)
55. The Hague, Netherlands 475,197 December 31, 2005 (official)
56. Lyon, France 466,400 January 1, 2005 (official)
57. Antwerp, Belgium 461,496 January 1, 2006 (official)
58. Gdańsk, Poland 458,053 December 31, 2005 (official)
59. Edinburgh, UK 457,830 June 30, 2005 (official)
60. Liverpool, UK 447,500 June 30, 2005 (official)
61. Leeds, UK 443,247 June 30, 2005 (official)
62. Manchester, UK 441,200 June 30, 2005 (official)
63. Toulouse, France 435,000 January 1, 2005 (official)
64. Bratislava, Slovakia 425,459 December 31, 2005 (official)
65. Murcia, Spain 416,996 January 1, 2006 (official)
66. Szczecin, Poland 411,119 December 31, 2005 (official)
67. Bristol, UK 398,300 June 30, 2005 (official)
68. Tallinn, Estonia 396,193 January 1, 2006 (official)
69. Bochum, Germany 384,492 June 30, 2006 (official)
70. Las Palmas, Spain 377,056 January 1, 2006 (official)
71. Palma de Mallorca, Spain 375,048 January 1, 2006 (official)
72. Bologna, Italy 374,142 March 31, 2006 (official)
73. Florence, Italy 367,268 March 31, 2006 (official)
74. Brno, Czech Republic 366,757 June 30, 2006 (official)
75. Bydgoszcz, Poland 366,074 December 31, 2005 (official)
76. Thessaloniki, Greece 363,987 March 18, 2001 (official)
77. Kaunas, Lithuania 360,637 January 1, 2006 (official)
78. Wuppertal, Germany 358,746 June 30, 2006 (official)
79. Lublin, Poland 354,967 December 31, 2005 (official)
80. Bilbao, Spain 354,145 January 1, 2005 (official)
81. Nice, France 347,900 January 1, 2005 (official)
82. Plovdiv, Bulgaria 341,873 December 31, 2005 (official)
83. Bari, Italy 326,333 March 31, 2006 (official)
84. Bielefeld, Germany 326,268 June 30, 2006 (official)
85. Córdoba, Spain 322,867 January 1, 2006 (official)
86. Alicante, Spain 322,431 January 1, 2006 (official)
87. Valladolid, Spain 319,943 January 1, 2006 (official)
88. Cardiff, UK 319,700 June 30, 2005 (official)
89. Iaşi, Romania 317,812 July 1, 2004 (official)
90. Katowice, Poland 317,220 December 31, 2005 (official)
91. Bonn, Germany 312,996 June 30, 2006 (official)
92. Varna, Bulgaria 311,796 December 31, 2005 (official)
93. Ostrava, Czech Republic 310,078 June 30, 2006 (official)
94. Mannheim, Germany 307,772 June 30, 2006 (official)
95. Constanţa, Romania 307,447 July 1, 2004 (official)
96. Timişoara, Romania 307,265 July 1, 2004 (official)
97. Coventry, UK 304,200 June 30, 2005 (official)
98. Catania, Italy 303,785 March 31, 2006 (official)
99. Vila Nova de Gaia, Portugal 300,868 2004 (official)
100. Galaţi, Romania 298,941 July 1, 2004 (official)
Other notable cities
* Since this table covers only the European Union, cities in non-member countries are omitted, such as Moscow, Oslo, Reykjavík, Bern and Zürich.
* Brussels – the capital city of Belgium and unofficially referred to as the capital of the European Union is nowhere near the top 100 list, as the relatively small municipality has a total population of only 141,312 (Census estimate 2004). The greater Brussels-Capital Region has a population of over 1 million.
* Århus, Denmark - the city with 296,368 inhabitants is growing by about 2,500 inhabihants every year and will soon enter the Top 100.
* Bordeaux, France – the city in Aquitaine is not on the list because most people in the Bordeaux Metropolitan Area live in the suburbs, outside of the city limits. Population within the city proper: 230,600 (January 1, 2005).
* Ljubljana – the Slovenian capital has a total population of 258,873 and its population is currently declining.
* Luxembourg - the capital city of Luxembourg has a total population of 77,325 (Census Estimate 2004).
* Nantes, France – the city in Brittany is not on the list because most people in the Nantes Metropolitan Area live in the suburbs, outside of the city limits. Population within the city proper: 281,800 (January 1, 2005).
* Nicosia – the capital of Cyprus has a population of 47,832 (Census 2001). It is the third largest municipality in Cyprus.
* Lille, France – the city in French Flanders is not on the list because most people in the Lille Metropolitan Area live in the suburbs, outside of the city limits. Population within the city proper: 225,100 (January 1, 2005).
* Nottingham, United Kingdom, 273,863 (2003 est.) – the famous English city lost over 20,000 of its inhabitants between 1991 and 2001, owing mostly to migration from the inner city to suburbs outside the city limits.
* Porto, Portugal - 263,131 (2001 est.) - the second city in Portugal. One of the biggest metropolitan areas on the European Atlantic coast. Plans of an union with Vila Nova de Gaia could mean the formation of a city with 400,000 inhabitants.
* Strasbourg, France – another important city in terms of the European Union is just short of the list, with a population of 264,115 as of 1999, but the January 1, 2005 estimate suggests that it is now closer with a population of 272,700.
* Valletta, Malta – the capital city has a total population of only 7,199 (Census Estimate 2001). The largest city in Malta is Birkirkara, with a population just under 25,000.
* Venice, Italy – the famous Italian city was constantly losing population for over 20 years until 2003 when the influx of immigrant population gave Venice a net gain of 3417 citizens in comparison to 2002. The city may be back in the top 100 soon. Its current population is 271,663 (Census Estimate 2004-01-01).
* Cork, Ireland - the second city of the republic of Ireland with a population of roughly 186,000. The Cork City limits are very restrictive.The Greater Cork area is currently 370,000 and predicted to grow to 450,000 by 2020.
* Almere, Netherlands - did not have a population until 1976, has a pop. of 176,000 in 2006 and is forecast to have a pop. of 214,000 by 2010.
Cities likely to enter the top 100 in the near future
* L'Hospitalet de Llobregat, Spain - Barcelona suburb. The EU's biggest suburb currently has a total population of 250,536 and growing. The Catalan city is likely to enter the top 100 within five years.
* Santa Cruz de Tenerife, Spain - this city in the Canary Islands had a net gain of population of over 7,000 people between 2001 and 2005 according to Spanish Census estimates. This gain is due to a large influx of population from other EU countries. As of 2005 the city had a total population of 221,567 and with such growth the city is likely to crack the top 100 within the next decade.
* Münster, Germany - the city where the Peace of Wesphalia was signed is currently 101st largest in the EU and its population keeps on growing.
* Utrecht, the Netherlands. Utrecht has a population of 276,000 at this moment and is about to get a new area Leidsche Rijn, in which around 80,000 people can live.
* Sunderland a metropolitian borough, United Kingdom, an upcoming city in the United Kingdom which is slowly increasing in trade with the European Union with its newly built business park, it has an estimated population of 285,000, which is increasing quickly after a short decline.
Cities likely to lose their top 100 status in the future
* Bari and Catania, Italy - massive population losses for all Italian cities are especially large in the cities of southern part of Italy like these two.
* Belfast, United Kingdom - contrary to popular perceptions, Northern Ireland's migration rate has shown a net increase since 1995 - but this is countered by population movement from Belfast into the suburbs outside the city boundary. However, the planned reorganization of local government boundaries in Northern Ireland in 2009 should see the city limits extended and take the population back above 300,000, and back into the top 100.
* Wuppertal, Germany as other industrial cities in the Ruhr area has had a declining population for many years, and looking at the current demographic tendency it is all but certain that some of them will disappear from the top 100 list in the farer future as did another Ruhr area city Gelsenkirchen which was included in the top 100 until 2004.
* Katowice, Poland - this industrial city is losing its population quickly. In three years the city is unlikely to figure among the 100 largest EU cities.
Source:
http://en.wikipedia.org/wiki/Largest...in_city_limits