Algeria is a typically Mediterranean region, with cultures mainly of trees (vine, olive; wine production places Algeria in 4th place in the world), but it also provides a good quantity of cereals, early fruits, and tobacco. By no means negligible are the mineral resources (iron, phosphates, zinc, lead), but the industries that process them on site are of little account.
Communications are facilitated by a good railway network (5,000 km.), connected with Tunisia and Morocco.
Algiers is the second French port in terms of shipping traffic, and, after Alexandria, the most active commercial center in Africa. It now has 360,000 inhabitants; Oran has more than 200,000 and Constantine more than 100,000; six other centers exceed 40,000 inhabitants (Bône, Philippeville, Sidi-bel-Abbès, Tlemcen, Blida, and Tizi-Ouzou).
| Area | Population | Density | Capitals |
| in sq. km. | 1936 | per sq. km. | 1,000 inhabitants |
| Algiers | 54,701 | 2,240,911 | 41 | Algiers (367) |
| Constantine | 87,502 | 2,727,766 | 31 | Constantine (114) |
| Oran | 67,353 | 1,623,356 | 24 | Oran (201) |
| Ain Sefra | 650,151 | 193,347 | 0.3 | Colomb |
| Ghardaia | 143,712 | 166,366 | 1 | Lechouat (10) |
| Touggourt | 134,865 | 243,363 | 2 | Touggourt (12) |
| Oases of the South | 1,066,500 | 39,575 | 0.03 | Ouargla (6) |
TOTAL 2,204,784 7,234,684 3
For Christian history and archaeology V. AFRICA (lit: Ancient Christian History; v: Christian Monuments); ALGERIA.