US Congressman, Attorney, Entrepreneur. He was a United States Representative who served the State of New Mexico as a Congressional Delegate. He was born one of five children of Hispanic Ancestry to Juan Antonio Otero and his wife Mercedes Otero in Peralta, New Mexico, on August 29, 1844. He was educated locally and attended local common public and parochial schools before attending the prestigious Saint Louis University in St. Louis, Missouri. Following his education, he pursued commercial pursuits, stock raising, and eventually banking interests. He then served as a Probate Judge of Bernalillo County, New Mexico, from 1871 to 1879. He was offered the nomination by the Democratic State Convention as a Candidate for Delegate to represent the Forty-Fourth Congress, but he kindly declined the offer. He then decided to run for a seat in the United States Congress and was elected to succeed the outgoing United States Representative Trinidad Romero (1835-1918), on March 4, 1879. A Member of the Republican Party, he then served as an At-Large Delegate (Forty-Sixth Congress), in the United States House of Representatives from March 4, 1879, to March 3, 1881. He declined to be a Candidate for renomination in 1880. Following his term in the United States Congress, he was succeeded in office by the incoming United States Representative Tranquilino Luna (1849-1892), on March 4, 1881. After leaving the United States Congress, he resumed his former commercial pursuits, stock raising, and banking interests. He then returned to politics and served as the Commissioner of Bernalillo County, New Mexico, from 1884 to 1886. He was an unsuccessful Candidate for election to represent the Fifty-First Congress in 1888, and was an unsuccessful Candidate for election to represent the Fifty-Second Congress in 1890. After his retirement from politics he then once again returned to his former commercial pursuits, stock raising, and banking interests, as well as becoming involved in the manufacture of sulphur until his death. He passed away from complications from a stroke in Albuquerque, New Mexico, on February 1, 1904, at the age of 59, and he was buried in Mount Calvary Cemetery aka Santa Barbara Cemetery in Albuquerque, New Mexico. He was married to Ana Maria "Filomena" Perea de Otero (1848-1909), the daughter of the prominent merchant, businessman, and sheep farmer, Jose Leandro Perea (1823-1883), and his wife Dolores "Dollie" Chavez Perea (1826-1877), with whom he had a son, Alfredo J. Otero (1871-1939). He was the nephew of politician Miguel Antonio Otero I (1829-1882), and a cousin of politician, businessman, and author, Miguel Antonio Otero II (1859-1944).