Meiners Oaks is an unincorporated community lying west of the city of Ojai in Ventura County, California, United States.

For statistical purposes, the United States Census Bureau has defined Meiners Oaks as a census-designated place (CDP).

German native John Meiners had immigrated to America in 1848 and established a successful brewing operation in Milwaukee.

Upon arriving in person, Meiners also found the climate agreeable, and established a ranch.

Several hundred acres, north of the oak grove, were used quite successfully to grow lemons, oranges, plums, apricots and apples, as well as oats, wheat, barley and more.

[5] Meiners Oaks is in the heart of the Ojai Valley, very close to the Ventura River, where there are several hiking trails.

During dry spells with continental air, morning temperatures, due to Ojai's valley location, can drop well below most of Southern California, with the record being 13 °F (−10.6 °C) on January 6 and 7 of 1913.

On the other hand, Meiners Oaks is far enough from the sea to minimize marine cooling, and very hot days can occur during summer, with the record being 119 °F (48.3 °C) on June 16, 1917 – when it fell as low as 65 °F (18.3 °C) in the morning due to clear skies and dry air.

Typically for much of coastal southern California, most precipitation falls in the form of rain between the months of October and April, with intervening dry summers.

In contrast, the median annual rainfall for all years in Meiners Oaks is only around 18.1 inches or 460 millimetres and in the driest "rain year" from July 2006 to June 2007, just 6.87 inches or 174.5 millimetres fell in twelve months.

This reflects a decrease in population of 4.8%, as compared with the 2000 census (not a difference of "one person" as noted above).