Monrovia is located 20 miles northeast of Los Angeles in the foothills of the San Gabriel Mountains in the San Gabriel Valley in the county of Los Angeles. Monrovia was founded May 17, 1886 and incorporated in 1887. 

• Area: 13.73 sq. miles
  
• Median Age: 37.9
• Population: 38,087 (2024 estimate)
• Population: 37,931 (2020 Census)
  • White: 34%
  • Hispanic: 39.5%
  • Black: 5.2%
  • Asian: 16.4%
  • Other: 1.7%
• Households: 14,556
  • Average Household Income:  $94,606
    
  • Average Household Size: 2.60
    
  • Housing Units: 15,241

View the 2020 Monrovia Census Summary  

View the 2019 City of Monrovia Profile.

View the State of California Department of Finance Population and Housing Estimates 

Your Elected Representatives

California

• U.S. Senator Diane Feinstein
• U.S. Senator Alex Padilla

Legislative Districts

• Congressional District 28^th - Representative Judy Chu
• Congressional District 31^st - Representative Grace Napolitano
• State Senate District 25^th - Senator Anthony Portantino 
• State Assembly District 41^st - Assemblymember Chris Holden
• State Assembly District 48^th - Assemblymember Blanca Rubio 

Municipal

• Your Monrovia City Council