The nearest Tube station is Kew Gardens (zone 3) on the District Line, Richmond branch. The journey from central London takes around 40 minutes. The National Archives is 600 metres (a 10-minute walk) from Kew Gardens station.
The R68 bus route (from Hampton Court via Richmond) terminates by the entrance to The National Archives. Other routes stopping nearby include:
65 (Ealing to Kingston via Richmond), alight on Kew Road near Victoria Gate (15-minute walk)
237 (Shepherd's Bush to Hounslow Heath via Chiswick), alight at Kew Bridge (20-minute walk)
267 (Hammersmith to Fulwell via Brentford), alight at Kew Bridge (20-minute walk)
391 (Fulham to Richmond via Hammersmith), alight at Sandycombe Road near Kew Gardens station (10-minute walk)
The nearest overground train station is Kew Gardens. It is served by the London Overground from Stratford in east London, passing through Highbury and Islington, Gospel Oak, West Hampstead and Willesden Junction.
Other convenient railway stations are Richmond and Kew Bridge, both on the mainline into London Waterloo via Clapham Junction. Kew Bridge station is approximately a 20-minute walk from The National Archives, while Richmond station is one Tube stop away (or a 10-minute bus ride on bus R68).