Agripina Casimira de los Dolores Samper Agudelo (4 March 1833 — 22 April 1892) was a Colombian poet. Having a literary family, she received an education not easily accessible to women of her time and country. She wrote prose and poetry under the pseudonym "Pía-Rigán", an anagram of her given name. Her work remained unpublished during her lifetime and was only anthologized and published posthumously.