Faustina I (The Elder) was a Roman empress who lived in the second century AD. She was the wife of Emperor Antoninus Pius and the mother of Empress Faustina II (The Younger). She was also the aunt and adoptive mother of Emperor Marcus Aurelius, and the grandmother of Emperor Commodus.

Faustina was born around 100 AD as Annia Galeria Faustina, the daughter of Marcus Annius Verus and Rupilia Faustina. Her father was a consul and a prefect, and her mother was a niece of Emperor Hadrian. She had two brothers, Marcus Annius Libo and Marcus Annius Verus, who both held high offices in the Roman state. She also had two maternal aunts, Vibia Sabina, who married Hadrian, and Matidia Minor, who was the mother of Sabina and Faustina II.

Faustina married Antoninus Pius, a prominent senator and governor, between 110 and 115 AD. They had four children: two sons, Marcus Aurelius Fulvius Antoninus and Marcus Galerius Aurelius Antoninus, who died young; and two daughters, Aurelia Fadilla, who also died young, and Annia Galeria Faustina Minor, who became the wife of Marcus Aurelius.

In 138 AD, Hadrian adopted Antoninus Pius as his successor, on the condition that he would adopt Marcus Aurelius and Lucius Verus as his heirs. Faustina thus became empress when Antoninus ascended the throne. She was honored with the title of Augusta and various coins and statues were issued in her name. She accompanied her husband on his travels and was involved in charitable works and patronage of arts and culture. She was also respected for her piety and virtue.

Faustina died in 140 AD, while traveling with Antoninus near Rome. She was deified by the Senate and her husband built a temple for her on the Campus Martius. He also founded a charity for orphaned girls called the Puellae Faustinianae (Faustinian Girls) in her memory. Her cult was popular among the Roman people and she was depicted as a goddess on many monuments and artworks. Her death deeply affected Antoninus, who mourned her for the rest of his life.