Amsterdam IX (electoral district)

The territory of Amsterdam IX roughly corresponded with the neighbourhoods of Oud-West, Frederik Hendrikbuurt and Staatsliedenbuurt, all located in the current borough of Amsterdam-West.

However, Tak van Poortvliet was also elected in the district of Beverwijk and opted to represent the latter, thus triggering a by-election in Amsterdam IX in which the Liberals held the seat.

In 1901, the district elected Cornelis Lely, but he resigned a year later following his appointment as Governor-General of Suriname.

In the subsequent by-election, the Anti-Revolutionary Hendrik Bijleveld narrowly defeated Social Democratic (SDAP) leader Pieter Jelles Troelstra in the runoff, becoming the only representative from the parliamentary right in the district's existence.

Amsterdam IX was won by the Free-thinking Democratic League in 1905, and was represented by the SDAP from 1909 until its abolition in 1918.