First, a quick clarification: there is no "Lynnwood" in California. The city you're likely asking about is Lynwood (one 'n'), located in Los Angeles County, just southeast of downtown LA.
Incorporated in 1921, Lynwood (pop. ~67,000) is a dense, predominantly Latino working-class community. Key landmarks include St. Francis Medical Center, Plaza Mexico shopping center, and the historic Lynwood Pacific Electric Railway depot. It's the birthplace of tennis legends Venus and Serena Williams.
Lynnwood, Washington (pop. ~39,000) is a suburb north of Seattle—about 1,130 miles from LA. Always double-check the state!