Lourdes Dominguez Lino (born 31 March 1981 in Pontevedra, Spain) is a Spanish professional female tennis player. On 11 September 2006 Domínguez Lino reached her career-high singles ranking: World No. 40.
In 2000 she played her first WTA main draw at Madrid. However, she lost in the first round to Nicole Pratt. She also played in her first grand slam, losing in the first round of qualifying at the US Open to Emilie Loit. She ended her year at No. 141. 
In 2002 she won her first main draw match at Bogota, defeating Emilie Loit 7-6 (7), 7-6 (7). She would end up losing to María Emilia Salerni in the next round. In Porto, she defeated her first top 40 player, then No. 33 Cristina Torrens Valero. She would loe in the next round to Cara Black. In Estoril, she reached her first main draw quarterfinal. In August, Lino was suspended from the WTA tour for 3 months, after testing positive for cocaine that March.
In 2003 she lost in the first round of Bogota to Gisela Dulko.
In 2004 she lost in the second round of Bogota.
In 2005 she reached the top 100 for the first time. In Bogotá she made it to the final as a qualifier, but ended up losing to Flavia Pennetta. Soon after that, she reached the quarterfinals at Rabat. She then debuted at the top 100 on August 15, climbing from No. 110 to No. 91. She ended at No. 77 in the world in singles and No. 63 in doubles.
In 2006 she made the quarterfinals of Pattaya City, losing to Shahar Peer. She then won her first WTA title defeating then No. 18 Flavia Pennetta in two tough sets. The next week she lost in the first round of Acapulco. She reached the second round of Indian Wells. After reaching the second round of Miami, she debuted at the top 50. After this she lost in the first round of Amelia Island, but then reached the third round of Charleston. She then won a Fed Cup match against Sybille Bammer. After this, she reached the quarterfinals, losing to Emilie Loit, in what would be their last match against each other after playing each other 8 times, in which Loit has won six and Lino has won two. She then faced a five-match losing streak that would go on from Rome to Fed Cup. She finally snapped it at Palermo, but would lose in the second round. After this, she would reach the finals of Budapest, losing to Anna Smashnova. She would end her year at No. 52 in singles and No. 93 in doubles.
In 2007 she reached the semifinals at Bogota, losing to Tathiana Garbin. She then reached the quarterfinals at Estoril, Palermo, and Bad Gastein. She ended at No. 72 in the world in singles and No. 63 in doubles.
In 2008, she lost in the first round at the Australian Open to Katarina Srebotnik, despite holding five match points. She then reached the quarterfinals at Vina Del Mar. She won the doubles tournament in Barcelona. She ended at No. 90 in singles and No. 89 in doubles.
In 2009, she reached the quarterfinals at Fes, losing to Anabel Medina Garrigues 7-6 (7), 7-6 (7).At the French Open she made it as far as the third round, where she lost to Canadian world # 24 Aleksandra Wozniak, 6–2, 3–6, 6–3, with some rallies lasting 25 shots. She did not win another WTA main draw match after this for the rest of the year. She ended her season at No. 137 in singles and No. 111 in doubles.
In 2010, as a qualifier, she reached the third round of the US Open, losing to Dominika Cibulkova 6-0, 6-1. She came back into the top 100. She ended her year at No. 85 in singles and No. 141 in doubles.
In 2011 she lost in the first round of Auckland to Renata Voracova despite holding five match points. she won her 2nd WTA Tour title, defeating Frenchwoman Mathilde Johansson 2–6, 6–3, 6–2 in Bogotá. After this, she reached the quarterfinals at Acapulco. She lost in the second round at Wimbledon, despite holding three match points against eventual quarterfinalist Marion Bartoli. She then retired in Cincinnati with a right foot injury. This tournament would turn out to be her last of the season. She ended at No. 79 in singles and No. 98 in doubles.