It's geographic position is included between :

Latitude Nord
40° 41' 29" (Punta S.Angelo at south)
40° 45' 39" (Punta Cornacchia at nord)

Longitude Est
13° 51' 10''(Punta Imperatore at west)
13° 58' 11" (Castello Aragonese at east)

Otherwise its position is :
1° 30' 28" Longitude East (Rome's meridian)
40° 43' 55" (Latitude Nord)

The island has a circumference of nearly 39 km, a surface of nearly 47 kmq, and a resident population that amounts to nearly 50.000 units.