Richard Harrington welcomed more than 60 residents to Parliament for a tour and a Q&A.
The MP for Watford invited guests from town, including a 15-week-old baby, for a visit on May 17.
Mr Harrington arranged for a coach to take the group from Watford to the House of Commons.
After an initial question and answer session, they were given a tour of the Commons and the House of Lords, including St Stephen's Hall and Westminster Hall.
Mr Harrington said: "As always, I thoroughly enjoyed welcoming local residents to Parliament for an evening tour and Q&A. Get in touch if you'd like to book your space on the next one."
Mr Harrington organises regular tours of Parliament for Watford residents. To book onto the next one call 01923 296 790 or email richard@richardharrington.org.uk
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