General State of the Foundation of the Colony of Nuevo Santander [Tamaulipas]
- Complete text, with annotations and search capability, of documentation from census records through 1757.
- http://www.ccplarchives.ci.corpus-christi.tx.us/cdm4/document.php?CISOROOT=/odf&CISOPTR=1296&REC=2

Catholic Encyclopedia
- Brief history and current demographics for the diocese of Tamaulipas.
- http://www.newadvent.org/cathen/14440c.htm

History and Genealogy of South Texas and Northeast Mexico
- Brief history, genealogy links and resources, and links to city and community information.
- http://vsalgs.org/stnemgenealogy/tamaul.html

Tamaulipas, Mexico - WorldGenWeb Project
- History and genealogy.
- http://www.rootsweb.com/~mextam/

Inventory of Historic Designations
- From "A Shared Experience". Photos, descriptions and addresses for buildings of historic significance.
- http://www.rice.edu/armadillo/Past/Book/Part3/tamaulip.html

Directory of the Churches of Christ
- Location, contact information, and worship and study schedule.
- http://church-of-christ.org/churches/Mexico/Tamaulipas_S.htm