James Langstaff Bowman (October 6 1879 - September 14 1951) was the first Speaker of the Canadian House of Commons from Manitoba.

Bowman had been a teacher and lawyer in Dauphin, Manitoba. In 1917 he became the town's mayor. He ran unsuccessfully in the 1925 and 1926 general elections for the Conservatives before finally winning a seat in the 1930 election that brought R.B. Bennett to power.

He became Speaker after his predecessor, George Black suffered a nervous breakdown in the summer of 1934 and was unfit to preside when the Canadian House of Commons reconvened in January 1935.

As the Deputy Speaker was ill, Bennett approached Bowman, a backbencher, hours before the House was to convene, about becoming Speaker for the rest of the Parliamentary term.

Bowman had little experience as Speaker and had to deal with a tense, pre-election session. MPs on all sides of the House felt that Bowman did well in the job, however, when the 1935 general election was held in the fall Bowman lost his seat by a large margin.

He returned to his law practice in Dauphin and failed in his attempt to regain his seat in the 1940 Canadian election. The defeat of the government meant that Bowman