A signal corps is a military branch, responsible for military communications (signals). Many countries maintain a signal corps, which is typically subordinate to a country's army.

Military communication usually consists of radio, telephone, and digital communications.

• Rejimen Semboyan Diraja, Malaysian Royal Signals Regiment
• Indian Army Corps of Signals, raised in 1911.
• Pakistan Army Corps of Signals, raised in 1947.
• Singapore Armed Forces Signals Formation
• Sri Lanka Signals Corps
• Israeli C4I Corps
• Korps Perhubungan TNI AD (Indonesian Army Signal Corps)
• Armed Forces of the Philippines Signal Corps
• Signal Department, Royal Thai Army

• Royal Australian Corps of Signals
• Royal New Zealand Corps of Signals

• Arma delle Trasmissioni, corps of Italian Army founded in 1953, see List of units of the Italian Army.
• Royal Corps of Signals, founded in the United Kingdom (under the name Telegraph Battalion Royal Engineers) in 1884.
• Communications and Information Services Corps (CIS), the signals corps of Ireland's Defence Forces.
• Communication and Information Systems Groups (CIS) of the Belgian Armed Forces, before: Transmission Troops
• Signal Brigade, a unit of the Serbian Armed Forces.
• Telegrafregimentet, Royal Danish Signal Regiment.
• Sambandsbataljonen in the Brigade Nord of the Norwegian Army
• Regiment Verbindingstroepen, a regiment of the Royal Netherlands Army.
• Fernmeldetruppe of Bundeswehr, before: Signal Corps of the Wehrmacht and Waffen SS.
• Signal Communications Troops of Russia.
• Signal Corps (French Army).
• Viestirykmentti, Signal Regiment of the Finnish Army.
• Swedish Army Signal Troops.

• Royal Canadian Corps of Signals, formed in 1903 as the Canadian Signalling Corps
• United States Army Signal Corps, founded in 1860 by Major Albert J. Myer

• Military communications
• Telegraph troops