| B. L. Zeagler Lbr Co | 1920s to ca. 1957 |
| Barnes Brothers tram road at Longview | 1876 to 1878 |
| Barrett & Cline Lumber Company | 1905 to 1919 |
| Beall, Lewis tram road | Proposed 1896 |
| Beall, Smithers & Co tram road | 1891 |
| Beaumont & Great Northern Railroad (the Onalaska and Northwestern Railroad) | 1905 to 1961 |
| Beaumont & Saratoga Transportation Company | 1905 to 1930s |
| Beaumont Lumber & Shingle Company tramroad. W. C. Gray, president; E. C. Wiess, vice-pres.; N. N. Crary, secretary; T. S. Reed, treasurer; John N. Gilbert, director. | 1905 to 1920 |
| Beaumont Sour Lake & Western Railroad | 1903 to current |
| Beaumont Timber Company at Beaumont | 1892 to 1909 |
| Beaumont, Trinity & Sabine | 1880 to 1936 |
| Beltex Lumber Company tram road at Maud | 1928 |
| Benford & Western Transportation Company | 1889? to 1929? |
| Benton Lumber Company or Nona-Fletcher Lumber Company | 1918 to 1923 |
| Bering Kiam and Southern Railroad | 1912 |
| Bermea Land & Lumber Company | 1897 to 1900 |
| Big Creek and Trinity Valley Railway | Unknown |
| Big Sandy Lumber Company | |
| Bivins Lumber Company tram road | 1900 to 1929 |
| Blount-Decker Lumber Company tram road at Alto | 1908 to 1921 |
| Boetcher [Boettcher] Lumber Company tram road at Westfield | |
| Boynton Lumber Company | 1908 to 1912 |
| Boynton Lumber Company | ca. 1904 to 1908 |
| Boynton Lumber Company | ca. 1910 to 1920 |
| Bradford-Hicks Lumber Company tram road | 1909 |
| Brown Hardwood Company | |
| Brown Lumber Company tram road | 1895 to 1905 |
| Bruce Lumber Company tram road at Porter | 1900 to 1910 |
| Burr's Ferry, Browndell, & Chester Railway Company | 1907 to 1927 |