Lost in the Dark can refer to:

• Lost in the Dark (play), a 1901 play by Roberto Bracco
• Lost in the Dark (1914 film), a 1914 Italian silent film
• Lost in the Dark (1947 film), a 1947 Italian film
• Lost in the Dark (2007 film), a 2007 TV film
• Lost in the Dark Unchanted Forest, the eleventh book in the Hank the Cowdog series

• A R Colquhoun
• AR Colquhoun
• Arco Metropolitano do Rio de Janeiro
• Arcomps
• Arcon
• Arcona (disambiguation)
• Arco Naturale
• Arconce
• Arcondo Nunatak
• Arconi
• Arconnay
• Arconovaldo Bonaccorsi
• Arconsat
• Arconville
• Arcopallium
• Arco progresista
• Arco Progresista
• Arco Progresista Party
• Arcoptilia
• Arcor (disambiguation)
• Arco (Renfe Operadora service)
• Arcor (food company)
• AR Cornelius
• A R Cornelius
• A. R. Cornelius