Helena Bonham Carter is the great-granddaughter of H.H. Asquith, who served as the Prime Minister of the United Kingdom from 1908 to 1916, during the height of the suffrage movement. He was a staunch opponent of votes for women.

This was the first film that was allowed to be shot in the British Houses of Parliament since the 1950s.

Helen Pankhurst, the great-granddaughter of Emmeline Pankhurst, and her daughter Laura have small roles in the film.

At the London premiere, feminist direct action group Sisters Uncut jumped the barriers and staged a lie-in on the red carpet to protest against cuts to domestic violence services, declaring "the battle isn't over yet". The stars of the film continued giving interviews and meeting fans as the activists chanted "Dead women can't vote" and "We are suffragettes". Interviewed at the premiere, Helena Bonham Carter said: "I'm glad our film has done something. That's exactly what it's there for," adding that the protest was the "perfect" response to the film.

The investigation of the suffragette movement was the first instance of law enforcement using photo surveillance of persons of interest.

Carey Mulligan didn't wash her hair for weeks during the shoot and wore very little make up to give her character a real feel.

Emmeline Pankhurst, the leader of the British suffragette movement who helped women win the right to vote, was born and raised in Moss Side, Manchester England. In 1999, Time Magazine named her one of the top 100 most important people of the 20th Century.

Maud Watts is a fictional character. She is a composite of several real women, placed in history among real people.

Just prior to the end credits is a list of countries in the order they gave women the vote, however the Isle of Man was omitted from the list. In 1881 the Isle of Man (a British crown dependency, with its own government) gave women who owned property the right to vote. Emmeline Pankhurst's mother, Sophia Goulden, was born on the Isle of Man and both Sophia, and Emmeline's father Robert, are buried there.

Meryl Streep described Helena Bonham Carter as a bundle of laughs. During the shoot many scenes were ruined when the actresses were giggling uncontrollably. Carey Mulligan said this laughter was much needed during the shoot of such a serious film.

The shoes that Meryl Streep (Emmeline Pankhurst) wore in the film were the same ones that she wore in Out of Africa (1985) 30 years earlier. As the production did not have any shoes in her size, she was allowed to wear them.

The singer P!nk originally wrote a song entitled "Wild Hearts Can't Be Broken" for this movie but decided to keep it for herself because she didn't want a pop song to be in this movie, as it should just be classical music. She ended up adding the song to her album Beautiful Trauma (2017).

The film takes place in 1912.

IMDb founder Col Needham makes a short credited appearance as a committee member.

One of about half a dozen politically themed pictures featuring actress Meryl Streep. The films are Julia (1977), Suffragette (2015), The Iron Lady (2011), Lions for Lambs (2007), The Manchurian Candidate (2004), and The Seduction of Joe Tynan (1979).

The original distributor for this film was Relativity Media, who picked it up in about October 2014. In March of 2015, after the success of The Theory of Everything, Focus Features managed to take over, four months before Relativity went bankrupt and got later defunct after The Disappointments Room and Masterminds in about 2016, forcing the film to turnaround to Focus Features in 2015.

As of 2019, this is the only movie appearance by Col Needham where he portrays someone other than himself.

Carey Mulligan (Maud Watts) and Natalie Press (Emily Wilding Davison) previously worked together in Bleak House (2005), as Ada Clare Carstone and Caddy Jellyby Turveydrop, respectively.