NDF
NDF or ndf may refer to:

Organisations
 National Democratic Front (disambiguation), several political organisations
 National Democratic Force, in Burma
 Neighborhood Development Foundation, an urban-renewal project in New Orleans, US
 National Development Front, an Islamic political organization in South India
 Neue Deutsche Filmgesellschaft, a film production company in Germany
 Nordic Development Fund, a regional bank of north European countries
 Norwegian Association of the Deaf (Norges Døveforbund)

Militaries
 National Defence Forces, a pro-Syrian government militia during the Syrian Civil War
 Norwegian Defence Force, the military of Norway
 Namibian Defence Force, the armed forces of Namibia

Science and technology
 Neutral-density filter, a photographic filter
 Neutral detergent fiber, a fiber-evaluating method used in animal nutrition
 Non drop-frame, video type designation used in SMPTE timecode

Other uses
 No defect found, things returned for repair not found to be faulty
 Non-deliverable forward, a financial instrument