Downey United Methodist Church (UMC) has a history that reflects both the pioneering spirit of early settlers and the evolving needs of a growing community. The church's origins trace back to 1854 when early Methodist settlers in the Los Nietos Valley, an area rich in natural resources and promising for agriculture, began holding prayer meetings in their homes. The efforts of these early Methodists, including visits from Rev. J.F. Blythe and the eventual assignment of Rev. J.T. Cox, laid the foundation for what would become the Los Nietos Methodist Episcopal Church, South.

In the post-Civil War period, as the region transitioned from agricultural to residential development, the church adapted to the changing landscape. The arrival of Rev. John Ardis in 1868 and his establishment of a school and camp meetings helped solidify the church's presence. By 1869, the church, now officially recognized and led by Rev. Alexander Groves, had grown significantly. The construction of the Los Nietos Collegiate Institute in the same year underscored the church’s commitment to education and community service, although the school eventually closed in 1879 as USC opened.

The church continued to evolve through the 20th century, relocating to the town of Downey in 1891 to better serve its growing congregation. A new sanctuary was dedicated in 1922, and further expansion occurred after World War II to accommodate the rapidly increasing population of Downey. The church's name has changed over the years, reflecting broader Methodist unifications, and today it is known as Downey United Methodist Church. Throughout its history, the church has been a cornerstone of community support and outreach, providing a space for worship, education, and service to all.