158 (one hundred [and] fifty-eight) is the natural number following 157 and preceding 159.

158 is a nontotient, since there is no integer with 158 coprimes below it. 158 is a Perrin number, appearing after 68, 90, 119.^[1]

158 is the number of digits in the decimal expansion of 100!, the product of all the natural numbers up to and including 100.

• USS Amador (AK-158) was a United States Navy Alamosa-class cargo ship during World War II
• USS Caution (AM-158) was a United States Navy Admirable-class minesweeper during World War II
• USS Chase (DE-158) was a United States Navy Buckley-class destroyer escort during World War II
• USS General W. G. Haan (AP-158) was a United States Navy General G. O. Squier-class transport following World War II
• USS Leary (DD-158) was a United States Navy Wickes-class destroyer during World War II
• USS Limestone (IX-158) was a United States Navy Trefoil-class concrete barge during World War II
• USS Newberry (APA-158) was a United States Navy Haskell-class attack transport during World War II
• USS Wadena (SP-158) was a United States Navy converted yacht patrol vessel during World War I

• The song 158 by the Indie-rock band Blackbud
• The song "Here We Go" (1998) from The Bouncing Souls’ Tie One On CD includes the lyrics "Me, Shal Pete and Lamar thumbed down the ramp of Exit 158"

• The Alfa Romeo 158 racecar
• The Ferrari 158 racecar produced between 1964 and 1965
• The British Rail Class 158 Express Sprinter is a diesel multiple unit (DMU) train, built for British Rail between 1989 and 1992

158 is also:

• The year AD 158 or 158 BC
• One of a number of highways
• The atomic number of an element temporarily called unpentoctium.^[2]
• 158 Koronis is a Main belt asteroid
• In the Israeli satirical comedy Operation Grandma ("Mivtza Safta", מבצע סבתא), the number 158 is implied to be a classified high-rank officer position (Alon says: "Since you've became 158, you became all that?")
• Township 158-30 is a small township in Lake of the Woods County, Minnesota
• Edenwold No. 158, Saskatchewan is a rural municipality in Saskatchewan, Canada
• John Irving's third novel, The 158-Pound Marriage
• Financial Accounting Standards Board summary of statement No. 158 requires an employer to recognize the overfunded or underfunded status of a defined benefit postretirement plan

• List of highways numbered 158
• United Nations Security Council Resolution 158
• United States Supreme Court cases, Volume 158
• Pennsylvania House of Representatives, District 158
• Consolidated School District 158, Illinois
• Marie Curie Middle School 158, Bayside, New York
• P.S. 158, Manhattan, New York City