The province of Badajoz (pronounced: [baðaˈxoθ]) is a province of western Spain located in the autonomous community of Extremadura. It was formed in 1833. It is bordered by the provinces of Cáceres, Toledo, Ciudad Real, Córdoba, Seville, and Huelva, and by Portugal.

With its area of 21,766 m², it is the largest province in Spain. The other province of Extremadura, Cáceres, is the second largest.

As of 2010^[update], the province has a population of 692,137. Its capital is the city of Badajoz. See also List of municipalities in Badajoz.

Although in many districts there are low ranges of hills, the surface is more often a desolate and monotonous plain, flat or slightly undulating. Its one large river is the Guadiana, which traverses the north of the province from east to west, fed by many tributaries; but it is only at certain seasons that the river-beds fill with any considerable volume of water, and the Guadiana may frequently be forded without difficulty. The climate is continental with great extremes of heat in summer and of cold in winter, when fierce north and north-west winds blow across the plains.

Badajoz (Spanish pronunciation: [baðaˈxoθ], formerly written Badajos in English; Extremaduran: Baajós) is the capital of the Province of Badajoz in the autonomous community of Extremadura, Spain, situated close to the Portuguese border, on the left bank of the river Guadiana, and the Madrid–Lisbon railway. The population in 2007 was 145,257.

Badajoz is the see of a bishopric. It occupies a slight eminence, crowned by the ruins of a Moorish castle, and overlooking the Guadiana. A strong wall and bastions, with a broad moat and outworks, and forts on the surrounding heights, give the city an appearance of great strength. The river, which flows between the castle-hill and the powerfully armed fort of San Cristobal, is crossed by a magnificent granite bridge, originally built in 1460, repaired in 1597 and rebuilt in 1833. The whole aspect of Badajoz recalls its stormy history; even the cathedral, built in 1238, resembles a fortress, with massive walls.

The association football teams in the city are Club Deportivo Badajoz and Cerro Reyes. Both teams play in the Segunda División B, while UD Badajoz play in the minor leagues.