The HŽ series 6111 is an electric multiple unit used by Croatian Railways (Croatian: hrvatske željeznice, HŽ), formerly the class JŽ 411 of ŽTP Zagreb during the period of Yugoslav Railways.

[1] Most of the sets were later modernized by TŽV Gredelj between 2002 and 2015, including both interior and exterior modifications.

Between 2011 and 2023 the units have been fully replaced with the HŽ 6112 series on Zagreb suburban lines, so remaining 6111 sets were mostly returned to serve regional routes across the country.

[3] Over the years, HŽ 6111 series units have had various modifications done, including the replacement of sliding side windows for tilting windows and the addition of exterior destination displays on the sides.

A meter gauge version of this trainset was also produced for use on the Sahel Metro in Tunisia; these units were known as YZ-E sets.