Alfter
Municipality
Schloss Alfter [de] in Alfter
Coat of arms
Location of Alfter within Rhein-Sieg-Kreis district
Alfter Show map of Germany Alfter Show map of North Rhine-Westphalia
Coordinates: 50°44′08″N 07°00′33″E / 50.73556°N 7.00917°E / 50.73556; 7.00917
Country	Germany
State	North Rhine-Westphalia
Admin. region	Köln
District	Rhein-Sieg-Kreis
Government
• Mayor (2020–25)	Rolf Schumacher[1] (CDU)
Area
• Total	34.73 km2 (13.41 sq mi)
Elevation	76 m (249 ft)
Population  (2023-12-31)[2]
• Total	23,949
• Density	690/km2 (1,800/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
Postal codes	53347
Dialling codes	02222, 0228
Vehicle registration	SU
Website	www.alfter.de

Alfter (Kölsch: Alefte) is a municipality in the Rhein-Sieg district, in North Rhine-Westphalia, Germany. It is situated approximately 6 km west of Bonn.

The community of Alfter lies west of former capital of Bonn, on the southern ridge of the "Vorgebirge". It borders on the city of Bornheim to the north, Bonn to the east, the cities of Meckenheim and Rheinbach to the south and the community of Swisttal to the west. Alfter consists of a total area of 35 km², of which 18 km² is used for agricultural purposes and 8 km² is forest.