Tijuana is on track to reach three million residents by 2040, up from 2.1 million today and just 340,000 in 1970. Municipal planning projections show the city adding roughly one million people over the next 15 years. One in two current residents was born outside Baja California. The growth will test water systems, roads and housing across the entire northern Baja corridor, from the San Ysidro border crossing south to Ensenada.
Tijuana Population Growth Driven by Jobs and Border Proximity
Tijuana’s six-fold expansion since 1970 tracks closely with the rise of the maquiladora sector. Mexico’s border manufacturing program, launched in the 1960s and supercharged by NAFTA in 1994, turned Tijuana into an industrial hub. The city now hosts more than 900 maquiladora plants employing roughly 250,000 workers. Those factories draw migrants from across Mexico, especially from states with fewer economic opportunities.
Sinaloa is the top origin state for non-native Baja residents in Tijuana, followed by Jalisco and Chiapas. The pattern reflects both proximity and push factors: cartel violence in Sinaloa, agricultural decline in Chiapas and economic restructuring in Jalisco have sent families north for decades. Tijuana also holds a notable population of U.S.-born residents, a group that includes deportees, binational families raising children on both sides of the border, and a newer wave of American remote workers drawn by lower rents.
The city’s position as Mexico’s busiest land port of entry compounds the draw. San Ysidro processes roughly 70,000 northbound crossings daily. That cross-border flow supports a service economy of customs brokers, logistics firms, medical tourism clinics and call centers that employ bilingual workers, many of them U.S.-born or U.S.-raised.
CESPT Water System Already Under Seasonal Strain
Tijuana’s water utility, CESPT (the state agency responsible for potable water and sewage in the Tijuana-Rosarito corridor), has struggled to keep pace with existing demand. Summer months bring rolling service cuts across eastern and southern colonias, where informal settlements often lack direct connections to the municipal grid. The utility relies heavily on water piped from the Colorado River via the Río Colorado-Tijuana Aqueduct, a system built for a much smaller city.
Adding one million residents by 2040 would require new wells, expanded treatment capacity and pipeline upgrades that CESPT’s budget has historically failed to cover. The utility carries chronic debt and has faced criticism for deferred maintenance on aging infrastructure. In 2024 and 2025, summer water pressure drops affected colonias across eastern Tijuana and parts of Playas de Rosarito, prompting complaints from residents who went days without reliable service.
Rosarito shares CESPT’s service territory, so pressure on the Tijuana grid ripples south. Developments along the Rosarito toll road corridor, popular with American and Canadian buyers, depend on the same strained water network. Property owners in communities like Puerto Nuevo, Calafia and La Misión already report inconsistent water pressure during peak summer months.
Housing Demand Pushes Buyers South Toward Rosarito and Ensenada
Tijuana’s housing crunch is visible in the numbers. Developers have approved thousands of new units annually, but demand consistently outpaces supply in middle-income neighborhoods near industrial parks. Median home prices in Tijuana rose roughly 30% between 2020 and 2025, pricing many local buyers out of established colonias.
That pressure pushes Tijuana workers south. Rosarito and the Highway 1-D toll road corridor have absorbed growing commuter traffic as families seek affordable housing outside the city center. Real estate agents in Rosarito report increasing competition between Mexican buyers relocating from Tijuana and foreign buyers looking for vacation or retirement properties. The dynamic has lifted prices in Rosarito’s beachfront zones while also driving development inland, where infrastructure is thinner.
Traffic on the Tijuana-Rosarito toll road (Highway 1-D) already backs up during weekday rush hours and weekend afternoons. Baja’s state government has proposed toll road expansions and a commuter rail line connecting Tijuana to Rosarito, but neither project has broken ground. Ensenada, 70 miles south, faces a milder version of the same pattern as remote workers and retirees relocate there for quality of life.
Binational Residents and the Shifting Demographic Mix
Tijuana’s U.S.-born population is difficult to count precisely, but estimates place it in the tens of thousands. Some are dual citizens who grew up crossing the border daily for school. Others are deportees with deep ties to American cities who now live permanently on the Mexican side. A growing share are remote workers, often younger Americans who discovered during the pandemic that a Tijuana apartment at $600 per month beat a San Diego studio at $2,200.
This binational population creates demand for English-language services, bilingual schools and cross-border healthcare. It also complicates planning: many U.S.-born residents maintain American bank accounts and health insurance, spending dollars in a peso economy. Their presence lifts certain neighborhoods economically while raising concerns about affordability for Mexican-born residents.
City planners are incorporating the 2040 projections into zoning decisions, water contracts and transit plans. The state’s broader growth blueprint positions Tijuana as a centerpiece, with proposed investments in cross-border freight infrastructure, public transit and new industrial parks. The next municipal budget cycle, expected in late 2026, will signal whether planners can match spending to the scale of projected growth. Reporting for this story draws on municipal planning data cited by Uniradio Baja.