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Early 20th century locomotive production in the U.S. included units made for both domestic and export markets. Foreign market production increased significantly during and immediately after World War I. In the following table (from Wright, 1930), the years 1905–1911 include Canadian output and the years 1912–1929 include both Canadian output and equipment built in railroad shops.
Locomotives built in the U.S. 1896–1929
Year
Domestic
Foreign
Total
1896
866
309
1175
1897
865
386
1251
1898
1321
554
1875
1899
1951
514
2465
1900
2648
505
3153
1901
-
-
3384
1902
-
-
4070
1903
-
-
5152
1904
-
-
3441
1905
4896
595
5491
1906
6232
720
6952
1907
6564
798
7362
1908
1886
456
2342
1909
2596
291
2887
1910
4441
314
4755
1911
3143
387
3530
1912
4403
512
4915
1913
4561
771
5332
1914
1962
273
2235
1915
1250
835
2085
1916
2708
1367
4075
1917
2585
2861
5446
1918
3668
2807
6475
1919
2162
1110
3272
1920
2022
1650
3672
1921
1185
638
1823
1922
1303
231
1534
1923
3505
280
3785
1924
1810
226
2036
1925
994
291
1285
1926
1585
185
1770
1927
1009
167
1176
1928
636
111
747
1929
1022
139
1161
Total production[]
The middle of the 20th century marked the end of large commercial production of steam locomotives in North America. Estimates of total production can be broken down into two time periods based on the period before and after the creation of American Locomotive Company in 1901. The following table provides a summary of this production and in some cases represents estimates rather than precisely known values (Bruce, 1952). A detailed list of manufacturers shows many of the larger producers. The Baldwin Locomotive Works was the largest producer of steam locomotives in the US, possibly the world, having produced around 70,000.
Summary of steam locomotives built in the U.S. 1831–1950
Bruce, Alfred W. (1952). The Steam Locomotive in America: Its Development in the Twentieth Century. New York: Bonanza Books. Table 3, partial excerpt.
Wright, Roy V., editor (1930). Locomotive Cyclopedia of American Practice, Ninth Edition. New York, N.Y.: Simmons-Boardman Publishing Company. p. 108.CS1 maint: multiple names: authors list (link) Table I, with corrections to Total column. This reference cites annual review issues of Railway Age as the primary source the table.