Nyamira West Field (formerly part of the Nyamira Conference) is a regional administrative unit of the Seventh-day Adventist Church in Kenya, officially organized in 2020 to enhance mission effectiveness and administrative efficiency within its territory. Since its establishment, the field has experienced steady growth in membership, church development, and community outreach initiatives.

Geographically, Nyamira West Field serves a diverse and expansive territory covering Masaba North and Manga sub-counties in Nyamira County, as well as Masaba South, Kitutu Chache South, and Kitutu Chache North sub-counties in Kisii County. This region is characterized by a vibrant and densely populated community, providing both opportunities and responsibilities for evangelism, education, and social services.

As of June 30, 2025, the field oversees