OLS

OLS or Ols may refer to:


 * Oleśnica (German: Öls), Poland
 * Operation Lone Star, Texas border operation
 * Optical landing system, U.S. Navy landing system
 * Order of Luthuli in Silver, a South African honour
 * Ordinary least squares, a method used in regression analysis for estimating linear models
 * Ottawa Linux Symposium, tech conference held annually from 1999 to 2014
 * Oulun Luistinseura, a Finnish multi-sports club
 * The Sims 3: Outdoor Living Stuff, the third stuff pack to The Sims 3
 * Nogales International Airport, Arizona, US (IATA code)