The name Wildomar is a combination of the first names of the first founders of the town in December  1886. “Wil” for William Collier, “do” for Donald Graham, and “mar” for Margaret Collier Graham, wife of Donald Graham and sister of William Collier. It was once a sleepy rural Inland Empire town. It is a fast-growing area becoming more suburbanized because of its location with housing costs more affordable than its neighboring cities.  It grew more than twice its numbers in population from the 2000 census to the 2010 census. The largest employer of Wildomar is Lake Elsinore Unified School District. 

The weather is pleasant for most months of the year. Summer can get very hot with an average temperature of 99 degrees and cooler evenings. Winters are mild with an average of 65 degrees with rainfall average about 9 inches. The weather makes it a popular place for recreation at its’ four city parks, which include baseball fields, full basketball courts, large multi-use soccer fields, and picnic shelters. One park has a concession stand for special events and another has a dog park. Wildomar’s newest park opened in 2019 with a view of the Cleveland National Forest Mountains, home to the Santa Rosa Plateau Ecological Reserve. Wildomar has two more city parks in the planning stage that will triple the city’s recreation space.

Wildomar officially became a city on July 1, 2008.