Terrorist groups - home based:
Army of Islam (AOI): aim(s): stage attacks against Israel and Egypt from the Gaza Strip and, ultimately, establish an Islamic emirate in the region
area(s) of operation: headquartered in Gaza; heaviest presence and operational activity is in the Gaza Strip
note: operatives have a history of launching low-impact rockets into Israeli and Egyptian territory; the Army of Islam (Jaish al-Islam, JAI) in Syria is unrelated to AOI (2018)
HAMAS: aim(s): maintain control of the Gaza Strip to facilitate Palestinian nationalist aims
area(s) of operation: headquartered in Gaza (2018)
Mujahidin Shura Council in the Environs of Jerusalem (MSC): aim(s): bolster its staging capabilities in the Gaza Strip against Israel and, ultimately, destroy the state of Israel
area(s) of operation: headquartered in Gaza, although present in Egypt, Libya, Syria, and Israel (2018)
Palestine Islamic Jihad (PIJ): aim(s): enhance its staging capabilities in the Gaza Strip to launch attacks against Israel
area(s) of operation: stages rocket attacks against civilians and military personnel primarily in southern Israel (2018)
Palestine Liberation Front (PLF): aim(s): bolster its staging capabilities in the Gaza Strip against Israel and, ultimately, destroy the state of Israel in order to establish a secular, Marxist Palestinian state with Jerusalem as its capital
area(s) of operation: based in Gaza; maintains a recruitment and paramilitary training presence in most of the refugee camps across the Gaza Strip (2018)
PFLP-General Command (PFLP-GC):
aim(s): bolster its staging capabilities to prepare fighters for deployment to Syria and to launch occasional attacks inside Israel; ultimately, seeks to establish a Palestinian state
area(s) of operation: headquartered in Gaza; as a longtime supporter of the Syrian Government, the group trains and deploys fighters to Syria to fight on behalf of President Bashar al-ASAD; stages occasional small-scale attacks inside Israel (2018)
Popular Front for the Liberation of Palestine (PFLP): aim(s): destroy the state of Israel and, ultimately, establish a secular, Marxist Palestinian state
area(s) of operation: headquartered in Gaza, recruiting and training fighters; stages limited attacks against Israel (2018)

Terrorist groups - foreign based:
Abdallah Azzam Brigades (AAB):
aim(s): bolster its staging capabilities in the Gaza Strip against Israel to continue its attempts to disrupt Israel's economy and its efforts to establish security
area(s) of operation: launches homemade rockets from the Gaza Strip into populated Israeli territory, primarily the cities of Nahariya and Ashkelon (2018)
al-Aqsa Martyrs Brigade (AAMB):
aim(s): bolster its staging capabilities in the Gaza Strip against Israel and, ultimately, establish a Palestinian state comprising the West Bank, Gaza Strip, and Jerusalem
area(s) of operation: stages attacks from the Gaza Strip against Israeli soldiers and civilians inside Israel, including launching rockets and missiles (2018)
Islamic Revolutionary Guard Corps -- Qods Force (IRGC-QF):

aim(s):  supports the destruction of Israel through funding, training, and weapons
area(s) of operation:  Gaza Strip (2019)
Islamic State of Iraq and ash-Sham (ISIS)-Sinai:
aim(s): bolster its staging capabilities in the Gaza Strip against Israel and, ultimately, establish a regional Islamic caliphate
area(s) of operation: stages attacks against Egyptian forces along the Gaza Strip-Egypt border and launches rockets into southern Israel from the border closest to Israel
note: formerly known as Ansar Bayt al-Maqdis (2018)