Pomona College (/pəˈmoʊnə/ ^ⓘ pə-MOH-nə) is a private liberal arts college in Claremont, California. It was established in 1887 by a group of Congregationalists who wanted to recreate a "college of the New England type" in Southern California. In 1925, it became the founding member of the Claremont Colleges consortium of adjacent, affiliated institutions.

Pomona is a four-year undergraduate institution that enrolls approximately 1,700 students. It offers 48 majors in liberal arts disciplines and roughly 650 courses, as well as access to more than 2,000 additional courses at the other Claremont Colleges. Its 140-acre (57 ha) campus is in a residential community 35 miles (56 km) east of downtown Los Angeles, near the foothills of the San Gabriel Mountains.

Pomona is considered one of the most prestigious liberal arts colleges in the country. It has a $3.01 billion endowment as of June 2024^[update], making it one of the 10 wealthiest schools in the U.S. on a per student basis. Nearly all students live on campus, and the student body is noted for its racial, geographic, and socioeconomic diversity. The college's athletics teams, the Sagehens, compete jointly with Pitzer College in the SCIAC, a Division III conference.

Prominent alumni of Pomona include Oscar, Emmy, Grammy, and Tony award winners; U.S. Senators, ambassadors, and other federal officials; Pulitzer Prize recipients; billionaire executives; a Nobel Prize laureate; National Academies members; and Olympic athletes. The college is a top producer of Fulbright scholars and recipients of other fellowships.

Pomona College was established as a coeducational and nonsectarian Christian institution on October 14, 1887, amidst a real estate boom and anticipated population influx precipitated by the arrival of a transcontinental railroad to Southern California. Its founders, a regional group of Congregationalists, sought to create a "college of the New England type", emulating the institutions where many of them had been educated. Classes first began at Ayer Cottage, a rental house in Pomona, California, on September 12, 1888, with a permanent campus planned at Piedmont Mesa four miles north of the city. That year, as the real estate bubble burst, making the Piedmont campus financially untenable, the college was offered the site of an unfinished hotel (later renamed Sumner Hall) in the nearby, recently founded town of Claremont. It moved there but kept its name. Trustee Charles B. Sumner led the college during its first years, helping hire its first official president, Cyrus G. Baldwin, in 1890. The first graduating class, in 1894, had 11 members.

Pomona suffered through a severe financial crisis during its early years, but raised enough money to add several buildings to its campus. Although the first Asian and black students enrolled in 1897 and 1900, respectively, the student body (like most others of the era) remained almost all white throughout this period. In 1905, during president George A. Gates' tenure, the college acquired a 64-acre (26 ha) parcel of land to its east known as the Wash. In 1911, as high schools became more common in the region, the college eliminated its preparatory department, which had taught pre-college level courses. The following year, it committed to a liberal arts model, soon after turning its previously separate schools of art and music into departments within the college. In 1914, the Phi Beta Kappa honor society established a chapter at the college. Daily attendance at chapel was mandated until 1921, and student culture emphasized athletics and academic class rivalries. During World War I, male students were divided into three military companies and a Red Cross unit to assist in the war effort.

Confronted with growing demand in the 1920s, Pomona's fourth president, James A. Blaisdell, considered whether to grow the college into a large university that could acquire additional resources or remain a small institution capable of providing a more intimate educational experience. Seeking both, he pursued an alternative path inspired by the collegiate university model he observed at Oxford, envisioning a group of independent colleges sharing centralized resources such as a library. On October 14, 1925, Pomona's 38th anniversary, the college founded the Claremont Colleges consortium. Construction of the Clark dormitories on North Campus (then the men's campus) began in 1929, a reflection of president Charles Edmunds' prioritization of the college's residential life. Edmunds, who had previously served as president of Lingnan University in Guangzhou, China, inspired a growing interest in Asian culture at the college and established its Asian studies program.

Pomona's enrollment declined during the Great Depression as students became unable to afford tuition, and its budget was slashed by a quarter. The college reoriented itself toward wartime activities again during World War II, hosting an Air Force military meteorology program and Army Specialized Training Program courses in engineering and foreign languages.