N40 may refer to:

Roads

N40 road (Ireland) The N40 road (commonly known as the Cork South Ring Road, or locally 'The South Link') is a national primary road in Cork City, Ireland. The road runs through Cork City forming an orbital and distributor route through the south side of the city, ...

N-40 National Highway The National Highway 40 () or the N-40 is one of Pakistan National Highway running from Lakpass near Quetta to the border town of Taftan via Naukundi in Baluchistan, Pakistan extending into Iran via Road 84. It is a two lane highways with total ...

in Pakistan *

Nebraska Highway 40 Nebraska Highway 40 is a highway in central Nebraska. It has a length of . It has a western terminus at Nebraska Highway 92 in Arnold and an eastern terminus north of Kearney at an intersection with Nebraska Highway 10. Route description Nebr ...

, in the United States

Other

N40 (Long Island bus) The following bus routes are operated in Nassau County, New York. Most of these routes are operated under Nassau Inter-County Express (NICE), formerly MTA Long Island Bus, except in Greater Long Beach, where that city operates its own bus service ...

Benign prostatic hyperplasia Benign prostatic hyperplasia (BPH), also called prostate enlargement, is a noncancerous increase in size of the prostate gland. Symptoms may include frequent urination, trouble starting to urinate, weak stream, inability to urinate, or loss o ...

BMW N40 The BMW N40 is a DOHC four-cylinder petrol engine which replaced the 1.6 litre versions of the BMW M43. It was produced from 2001-2004 and only sold in several countries, where taxes favoured cars with smaller displacement engines. The N40 w ...

, an automobile engine *

Naughty Forty Naughty Forty (Naughty 40 or N40) is a football hooligan firm linked to the English team Stoke City F.C. Background At their height, the firm had over 700 members and were among the more violent football hooligan firms in England. In Janu ...

, a football hooligan firm linked to Stoke City F.C. *

Sky Manor Airport (New Jersey) Sky Manor Airport is a public airport located 2 miles (3.2 km) southwest of Pittstown, serving Hunterdon County, New Jersey, United States. The airport has one runway and is mostly used for general aviation. History The airport was owned ...

, in Hunterdon County, New Jersey, United States *

Toyota Hilux (N40) The , stylized as HiLux and historically as Hi-Lux, is a series of pickup trucks produced and marketed by the Japanese automobile manufacturer Toyota. The majority of these vehicles are sold as pickup truck or cab chassis variants, although the ...

, a Japanese pickup truck * IBM RISC System/6000 N40, a laptop; see IBM RS/6000 § Type 7007 {{Letter-NumberCombDisambig