Walnut is an affluent city in Los Angeles County, California, United States. The population was 29,172 at the 2010 census and its current mayor is Tom King, a former Detective from the Los Angeles Police Department.
The city of Walnut obtained its name from the Rancho Los Nogales Mexican land grant, nogales being the Spanish word for "walnut." With exceptions to some busy intersections (such as Grand Avenue and Amar near Mt. San Antonio College), the hill-dotted city is relatively quiet in comparison to nearby neighborhoods like La Puente and West Covina. The city covers nearly nine square miles (23 km2) and is home to hundreds of businesses.
Money's Best Places to Live, "America's best small towns," ranked Walnut as #70 in 2009 and #57 in 2011, the highest ranking for a Californian city both years.