Maruti 800 is a city car manufactured by Maruti Udyog in India. It is a rebadged version of a Suzuki Alto.

It used to be the largest selling car in India until the Maruti Alto recently took that title. It is also exported to a number of countries in southeastern Asia including Bangladesh and Sri Lanka, and to some South American markets (as Chile, sold as Suzuki Maruti), and was available in selected European markets between 1988 and 1992, sold as the Suzuki Maruti. The car comes in different versions including one with air conditioning and one without. It was launched in December 1984 with almost 100% imported components.

The 800 has undergone some minor face lifts but overall it still remains the same as it was in 1984. The car has reported slipping sales in recent times, mainly due to the introduction of the more attractive Alto at a comparable price. The car produces approximately 37 bhp (28 kW) of power and runs on 12 inch (305 mm) wheels. Curb weight is and 4 passengers (including the driver) fit in comfortably. Top speed is in the region of and the frugal car is known to deliver fuel economy better than 20 km/l (47 mpg) on clear and plain roads. Maruti Suzuki had earlier launched a version with a 4 valves per cylinder engine producing 45 bhp coupled with a 5-speed manual transmission (currently found in the Suzuki Alto) but discontinued it after a couple of years.

A Euro III emission compliant version of the car was released in 2005 in India.

The Maruti 800 is still popularly hailed in India as "the smallest car in production" due to its relatively tightly spaced interior.

[[Image:maruti-800.jpg|thumb|300px|right|[A 1987 model Maruti 800].]]