Where is ie in california

Content on WhatAnswers is provided "as is" for informational purposes. While we strive for accuracy, we make no guarantees. Content is AI-assisted and should not be used as professional advice.

Last updated: April 8, 2026

Quick Answer: IE refers to the Inland Empire, a major metropolitan region in Southern California covering over 27,000 square miles across Riverside and San Bernardino counties. With a population exceeding 4.6 million people as of 2020, it's one of the fastest-growing regions in California, featuring major cities like Riverside, San Bernardino, Ontario, and Moreno Valley. The region serves as a crucial logistics and distribution hub, with the Ontario International Airport handling over 5.5 million passengers annually.

Key Facts

The Inland Empire covers 27,271 square miles across Riverside and San Bernardino counties
Population exceeds 4.6 million people as of 2020 U.S. Census
Ontario International Airport handles over 5.5 million passengers annually
Riverside was founded in 1870 and incorporated in 1883
The region's GDP exceeds $150 billion annually

Overview

The Inland Empire (IE) is a major metropolitan region and statistical area in Southern California, encompassing Riverside and San Bernardino counties. This expansive region covers over 27,000 square miles, making it larger than several U.S. states combined. The term "Inland Empire" gained popularity in the 1980s as the area experienced rapid growth and development, distinguishing it from coastal Southern California regions.

Historically, the region was inhabited by Native American tribes including the Cahuilla, Serrano, and Tongva peoples before Spanish colonization began in the 1770s. The modern development of the Inland Empire accelerated with the completion of the transcontinental railroad in the late 19th century. Riverside, founded in 1870, became the region's first incorporated city in 1883 and played a crucial role in establishing California's citrus industry.

How It Works

The Inland Empire functions as a distinct economic and cultural region within Southern California with several defining characteristics.

Geographic Scope: The Inland Empire covers 27,271 square miles across Riverside and San Bernardino counties, representing approximately 17% of California's total land area. This makes it larger than 10 U.S. states including West Virginia, Maryland, and Hawaii. The region stretches from the Los Angeles County border east to the Arizona and Nevada state lines.
Population Distribution: With over 4.6 million residents as of the 2020 U.S. Census, the Inland Empire represents California's third-largest metropolitan area after Los Angeles and the San Francisco Bay Area. The population has grown by approximately 15% since 2010, making it one of California's fastest-growing regions. Major population centers include Riverside (population 314,998), San Bernardino (222,101), Ontario (175,265), and Moreno Valley (208,634).
Economic Infrastructure: The region serves as a critical logistics and distribution hub for Southern California, with over 1.2 billion square feet of industrial warehouse space. Ontario International Airport handles more than 5.5 million passengers annually and serves as a major cargo facility. The region's highway system includes Interstates 10, 15, 215, and 60, facilitating transportation throughout the Southwest.
Governance Structure: The Inland Empire comprises two counties with 52 incorporated cities and numerous unincorporated communities. Riverside County was established in 1893, while San Bernardino County dates to 1853 and is the largest county in the contiguous United States by area. Regional planning is coordinated through organizations like the Southern California Association of Governments and local councils of governments.

Key Comparisons

Feature	Inland Empire	Los Angeles Metro Area
Population (2020)	4.6 million	13.2 million
Land Area	27,271 sq mi	4,850 sq mi
Median Home Price	$550,000	$850,000
Major Industries	Logistics, Healthcare, Manufacturing	Entertainment, Technology, International Trade
Population Growth (2010-2020)	15%	3%
Public Universities	UC Riverside, Cal State San Bernardino	UCLA, USC, Cal State LA

Why It Matters

Economic Impact: The Inland Empire generates over $150 billion in annual GDP, representing a significant portion of Southern California's economy. The region's logistics sector employs approximately 180,000 workers and handles goods for the entire Western United States. This economic activity supports local governments through tax revenue and provides employment opportunities for residents.
Housing Affordability: With median home prices around $550,000 compared to $850,000 in Los Angeles County, the Inland Empire provides more affordable housing options for California residents. This has made the region a destination for families and workers priced out of coastal markets. The relative affordability has contributed to the region's rapid population growth over the past two decades.
Transportation Hub: The region's strategic location between Los Angeles, Las Vegas, Phoenix, and San Diego makes it a critical transportation corridor. Major highways, rail lines, and Ontario International Airport facilitate movement of people and goods throughout the Southwest. This infrastructure supports not only local businesses but also regional and national supply chains.

The Inland Empire continues to evolve as a vital component of California's economic and social landscape. With projected population growth and ongoing infrastructure investments, the region is positioned to play an increasingly important role in Southern California's future. As climate change and housing affordability challenges affect coastal areas, the Inland Empire's strategic importance as an inland alternative will likely continue to grow, shaping development patterns throughout the 21st century.