Following are the largest banks in Spain ranked by total assets at December 31, 2011. As of March 2012, the 45 savings banks previously existing had been transformed into 11 banking institutions (including the integration of Caja3 into Ibercaja and CEISS into Unicaja).

Rank Bank Assets, EUR bn
31/12/2011
Assets, EUR bn
31/12/2010
Assets, EUR bn
31/12/2009
Assets, EUR bn
31/12/2008
1 Grupo Santander 1,251.53 1,217.50 1,110.53 1,049.632
2 BBVA 597.688 552.738 535.065 542.650
3 Bankia 1 302.846 283.152 n/a n/a
4 CaixaBank 2 270.425 50.986 49.106 43.502
5 la Caixa n/a 285.724 271.873 260.827
6 Banco Popular 130.926 130.140 129.290 110.376
7 Banesto 3 106.158 117.368 122.301 117.186
8 Sabadell 100.437 97.099 82.823 80.378
9 Catalunya Banc (CatalunyaCaixa) 76.528 76.585 n/a n/a
10 Novagalicia Banco (NCG Banco) 4 72.236 73.493 73.257 n/a
11 Banca Cívica 5 71.827 72.643 n/a n/a
12 Banco CAM 70.805 n/a n/a n/a
13 Banco Mare Nostrum (BMN) 6 67.201 69.859 n/a n/a
14 Bankinter 59.491 54.152 54.468 53.470
15 Liberbank 7 50.847 n/a n/a n/a
16 Caja España-Duero (Banco CEISS) 45.405 45.711 n/a n/a
17 Ibercaja 45.237 44.989 44.691 44.066
18 BBK (Bilbao Bizkaia Kutxa) 42.570 29.112 29.806 n/a
19 Unicaja 35.252 34.344 34.185 32.156
20 Banco Pastor 30.376 31.135 32.325 27.121
21 Unnim Banc 29.288 28.325 n/a n/a
22 Caja España n/a n/a 25.254 25.018
23 Caja Duero n/a n/a 21.390 20.744
24 Banco de Valencia 22.468 23.699 22.830 22.370
25 Caja3 (Cajatres) 20.725 20.763 n/a n/a
26 Kutxa 20.016 20.752 20.998 21.266
27 Banco Cooperativo Espanol 15.887 10.400 11.663 8.454

 1- Bankia  was formed in December 2010.
 2 - CaixaBank, incorporatedin July 2011, is a result of the reorganization of the ”la Caixa” Group.
 3 - Banesto (Banco Espanol de Credito) is a subsidiary of Banco Santander.
 4 - Novagalicia Banco was  formerly known as  Novacaixagalicia.
 5 - Banca Cívica was established in June 2010. Now it is a subsidiary of CaixaBank.
 6 - Banco Mare Nostrum was formed in 2010, from the integration of Cajamurcia, Caixa Penedès, CajaGRANADA and "Sa Nostra".
 7 - Liberbank  was established in March 2011 and includes Cajastur, Caja de Extremadura and Caja Cantabria.