The 5th Thailand National Games (Thai: กีฬาเขตแห่งประเทศไทย ครั้งที่ 5, also known as the 1971 National Games and 1971 Interprovincial Games) were held in Nakhon Sawan, Thailand from 2 to 9 December 1971, with contests in 13 sports.

These games were the qualifications of Thai athletes for the 1971 Southeast Asian Peninsular Games held in Kualalumpur, Malaysia.

[1] The 5th Thailand National Games represented 9 regions from 70 provinces.

The 1971 Thailand National Games featured 10 Olympic sports contested at the 1971 Southeast Asian Peninsular Games, 1974 Asian Games and 1972 Summer Olympics.

In addition, four non-Olympic sports were featured: badminton, sepak takraw, table tennis and tennis.