Euskirchen – Rhein-Erft-Kreis II was created in 1949, then known as
Bergheim – Euskirchen. In the 1953 through 1961 elections, it was named
Bergheim (Erft) – Euskirchen. In the 1965 through 1972 elections, it was named
Bergheim (Erft). In the 1976 election, it was named
Erftkreis II. In the 1980 through 2009 elections, it was named
Euskirchen – Erftkreis II. It acquired its current name in the 2013 election. In the 1949 election, it was North Rhine-Westphalia constituency 5 in the numbering system. In the 1953 through 1961 elections, it was number 64. From 1965 through 1976, it was number 57. From 1980 through 1998, it was number 58. From 2002 through 2009, it was number 93. In the 2013 through 2021 elections, it was number 92. From the 2025 election, it has been number 91. Originally, the constituency comprised the districts of Euskirchen and Bergheim (Erft). In the 1976 election, it comprised the district of Euskirchen and the municipalities of Erftstadt,
Bergheim, and
Kerpen from the
Erftkreis district. It acquired its current borders in the 1980 election. The Erftkreis district was renamed Rhein-Erft-Kreis in 2003, but the constituency's borders did not change. ==Members==