The Lada Niva Legend, formerly called the Lada Niva, VAZ-2121, and Lada 4×4 (Russian: Лада Нива), is a series of exclusively 4WD, small (hatchback) and compact (wagon and pickup) off-road cars, designed and produced by the Russian (former Soviet) manufacturer AvtoVAZ since 1977 – initially for the rural market, but later models also aimed at urban users. Sold as the marque name Lada in many markets, the 3-door, 4x4 hatchback is continuously built since 1977.
From the 1990s, three- and five-door wagons on a 50 cm (20 in) longer wheelbase, and an extra long pick-up, were added to the range. Following the demise of the original Land Rover and its successor Land Rover Defender in 2016, the Niva is the longest-running off-road car still in production in its original form. By the end of 2020, an estimated 650,000 plus Lada Nivas were on the roads of Russia, the Commonwealth of Independent (post-Soviet) States, and other countries.

The Lada Niva is the world's first mass-produced off-road vehicle with fully integrated body and frame (unibody) architecture. Combined with a coil-sprung independent front suspension, it is a predecessor to current crossover SUVs, nearly all of which follow this format; it inspired the Suzuki Vitara. The Lada 4x4 uses a worm-and-roller steering box carried over from the VAZ-2101 sedan and the original Fiat 124 sedan on which it was based. Pickup and emergency-van versions are produced by VIS-AVTO.

In August 2020, Lada took over production of the 2003 Chevrolet Niva, rebranding it as the 'new' Lada Niva. In December 2020 the new Lada Niva was further rebranded as Lada Niva Travel, while the old Lada Niva / 4×4, was rebranded as Lada Niva Legend in January 2021.