Immaculate Conception Church, Mediterranean Revival church in Sparks, Nevada.

Immaculate Conception Church is a brick Roman Catholic church built in 1932 at 590 Pyramid Way in Sparks, Nevada, designed by architect Frederic J. DeLongchamps in Mediterranean Revival style. A 1970 vestibule and porch, added for handicapped access, partly obscure its original front. The parish moved to a larger building at 2900 McCarran Way in 2004.

This structure was built in 1932 following the destruction of Sparks' first Catholic church, which burned on Easter Sunday in 1930. The architect Frederic DeLongchamps designed the replacement with Mediterranean Revival styling.

The parish moved to a larger building on McCarran Way in 2004, and the Prater Way church was photographed in 2014 under the sign "Iglesia Cristiana Monte Sinai", a Spanish-language Christian congregation. The building's later use by a Latino congregation mirrors Sparks' demographic change.

The parish now occupies a newer building at 2900 McCarran Way; the 1932 DeLongchamps church on Prater Way, listed on the National Register in 1992, is the historic structure. Its 1970 vestibule and porch were added for handicapped access and designed to stay architecturally compatible, though they partly obscure the original facade.

The 1932 brick church on Prater Way, designed by Frederic J. DeLongchamps, was listed on the National Register of Historic Places in 1992 as the oldest surviving Catholic church in Sparks. By 2014 the building housed a congregation called Iglesia Cristiana Monte Sinai.