There are 4 unique ZIP codes in Ontario, California. Area code: 909/951.
4
ZIP codes
50.69
sq mi land
0.03
sq mi water
909/951
area code
Ontario, CA ZIP code map
About Ontario, CA
Ontario, California, is a vibrant city located in San Bernardino County. Known for its rich diversity and dynamic economy, Ontario offers a blend of suburban living and urban convenience. With the convenience of shopping, dining, and various recreational opportunities, it has become a sought-after destination in the Inland Empire region.
Location & geography
Situated just east of Los Angeles, Ontario is conveniently located near several major highways, including Interstate 10 and Interstate 15. It shares borders with various cities, such as Rancho Cucamonga to the west (approximately 4 miles) and Chino to the south (around 6 miles), making it easily accessible. The city encompasses a land area of 64.98 square miles, with a small water area of 0.03 square miles.
Community & economy
Ontario boasts a diverse community characterized by a mix of cultures and vibrant neighborhoods. The local economy is primarily driven by industries such as logistics, manufacturing, and retail, fostering a thriving job market. Daily life in Ontario is enhanced by numerous parks, cultural events, and community gatherings that bring residents together.
Transportation
Transportation in Ontario is facilitated by major highways, including the Ontario Freeway that connects to both I-10 and I-15. The city is also home to the Ontario International Airport, which provides domestic and international flight services. Public transit options are available through Omnitrans, offering convenient bus routes throughout the city.
History
Founded in 1882, Ontario originally began as a citrus-growing community and has evolved into a key city in the Inland Empire. The area's fertile land supported agriculture, particularly citrus fruits, which were vital to the local economy for many years. Over time, Ontario developed into a commercial hub, increasingly focusing on logistics and distribution, especially with its proximity to the Ontario International Airport.
Did you know?
One little-known fact about Ontario is that it was named after Ontario, Canada, due to the influence of the city's early settlers. Additionally, Ontario International Airport is one of the fastest-growing airports in the region, contributing significantly to the local economy.
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions
What ZIP codes does Ontario, CA have?
Ontario, CA has 5 ZIP codes: 91758, 91761, 91762, 91762, 91764. Each ZIP code serves a distinct delivery area within the city and surrounding region.
What is the main ZIP code for Ontario, CA?
The primary ZIP code for Ontario, CA is 91758. The city uses area code 909 or 951 for phone service.
What county is Ontario, CA in?
Ontario is located in San Bernardino County, California.
How many ZIP codes are in Ontario, CA?
Ontario, CA has 5 ZIP codes.
What ZIP code covers the Ontario International Airport area and surrounding commercial district?
The Ontario International Airport and its adjacent business parks are primarily located in ZIP code 91761, which serves as the main commercial and aviation hub for the city.
Which ZIP codes serve the downtown Ontario area and central residential neighborhoods?
Downtown Ontario and the central residential areas are primarily served by ZIP codes 91762 and 91764, covering the historic downtown corridor and surrounding neighborhoods.
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