There's always more to be said, but I do have a past answer that deals with this question here, which I will paste below:

It's hard to say whether it was an accepted practice in real life. There are an extraordinary number of newspaper articles alleging that a judge here or there had determined that wife-spanking was fair, or that women in this or that town had formed a club for wives who approved of being spanked, but historical newspapers must be interrogated as primary sources - we have to analyze the bias they show, and not assume that they're basically and objectively factual, particularly when it comes to articles supposedly from other regions (such as a story set in Des Moines, Iowa, that's been syndicated and reprinted in Sacramento, California). In many cases, they seem to be completely fictional. Domestic violence was of course as much of an issue as ever in the past - as /u/BigBennP's answer makes clear - but it most likely involved the kinds of abuse we would expect to see today.

Night Worker's Right to Spank Wife Upheld

Sudbury, Ont. - The right of a night worker to spank his wife if breakfast isn't ready when he comes home was upheld by Magistrate J. S. McKessock. The judge dismissed an assault charge which Mrs. Paty Winters had brought against her husband, Edward. Winters testified he came home from the mine where he is employed and found no breakfast ready. His wife came downstairs and prepared it. He followed her back to the bedroom and scored three hits with a flat palm, he said.

(Salamanca Inquirer., November 20, 1936)

Husband May Spank Abusive Wife

Joliet, Ill. - A husband has the right to spank his wife if she makes him scrub the kitchen floor and then throws a flat iron at him for missing the corners. So Justice of the Peace McCowan decided when Joseph Selzniak's wife charged him with beating her.

(Fayetteville Bulletin., April 06, 1923)

A Pennsylvania judge has ruled that it is all right for a man to spank his wife if she doesn't "obey," from which we take it that the judge is not a married man.

(Canton Commercial Advertiser., February 05, 1935)

A lot of these news stories focus on a judge ruling that spanking was okay by virtue of his finding for the husband in a domestic violence case, ignoring the fact that there may have been other circumstances affecting the ruling - and this fabulous Pictorial article on this issue points out one 1924 case where the newspaper reported in a jolly tone that a woman was spanked for having her hair bobbed, but the actual court documents show that he punched her instead. So in the end, even if we accept all of these syndicated pieces as being real records of court cases, it's still up in the air whether or not they really involved spanking at all.

What we can say, however, is that a man spanking a woman he loved or would be in love with was a trope in pop culture in the early to mid-twentieth century. Representations of independent or aggressive or aloof women being dominated by their love interests (and loving it!) in a broader sense were all over the place: the proper romantic relationship might have playful banter, but the woman did not try to take control in a serious way or even be more skilled than her husband or lover, except in acceptable womanly pursuits. For a more hands-off example, the real Annie Oakley beat Frank Butler in a shooting match several years before they married, but in Annie Get Your Gun (1946), she deliberately loses to him in order to convince him that he's better than her, so he'll come back to her romantically. But there are entire websites devoted to pointing out scenes of spanking in mainstream films (here's an example), and as you can see, it happened in a lot of movies through the 1930s, 1940s, and 1950s. A female character stood up for herself, or insulted someone, or got in the way - there was always something that made her "deserve it", it was never used purposelessly - and in response, someone turned her over his knee and beat her as she struggled and gasped. The blog Vanilla Spanking documents a number of spanking scenes and the effects they and their rehearsals could have on the actresses involved here, and a good number of examples of films in which Maureen O'Hara was spanked here. (Honestly, the best source of information on this trend seems to be on fetishist websites - gender history scholars have not yet mined this rich vein.)

All of this reflected public uneasiness with changes in women's position in society. While activists had been working hard throughout the nineteenth century to give women more rights and opportunities, it's the early twentieth that saw young, unmarried women increasingly entering the workforce in white collar and retail positions, and then taking over both the blue and white collar worlds during World War II (more on this in my answer to Why is WW2 considered to be a major catalyst in the advancement of women in America when they had been a large part of the workforce since factories became mainstream?), having more freedom to engage in romantic and even sexual relationships, and of course getting the right to vote. Smoking and obvious cosmetics were creeping up the social ladder. Gratuitous spanking scenes in movies and television reinforced feminine powerlessness and childishness in the fight against change.