Altenbeken (, , in contrast to "") is a municipality in the district of Paderborn, in North Rhine-Westphalia, Germany.
Altenbeken is situated in the Eggegebirge, approx. northeast of Paderborn. To the west of the town is the Altenbeken Viaduct, a railway bridge that spans the Beke valley.
The current mayor is Matthias Möllers of the CDU who has been serving since 2020. In the 2025 local elections he was reelected with 50,75 % of the votes in the runoff election.
After the 2025 elections, the Altenbeken city council is composed as follows:
! colspan=2| Party ! Votes ! % ! +/- ! Seats ! +/- |- | bgcolor=| | align=left| Christian Democratic Union (CDU) | 2,637 | 60.5 | 10.3 | 17 | 2 |- | bgcolor=| | align=left| Social Democratic Party (SPD) | 1,164 | 26.7 | 1.3 | 7 | ñ0 |- | bgcolor=| | align=left| Alliance 90/The Greens (Grüne) | 556 | 12.8 | 3.1 | 4 | ñ0 |- ! colspan=2| Valid votes ! 4,357 ! 94.5 ! ! ! |- ! colspan=2| Invalid votes ! 256 ! 5.6 ! ! ! |- ! colspan=2| Total ! 4,613 ! 100.0 ! ! 28 ! ñ0 |- ! colspan=2| Electorate/voter turnout ! 7,163 ! 64.4 ! ! ! |- | colspan=7| Source: City of Altenbeken
Altenbeken consists of the following 3 districts
Since 2003, the railway and cultural festival Vivat Viadukt has taken place every two years in Altenbeken.
Altenbeken is twinned with: