The Forsyth Public Library North Carolina Room has city directories available from 1898 to the present.
The following are provided by Internet Archive on the web:
1879 – 1880 – Winston, Salem, Greensboro, NC city directory
1884 – Greensboro, Salem and Winston NC city directory
1889 – 1890 – Winston and Salem, NC city directory
1891 – 1892 – Winston and Salem, NC city directory
1894 – 1895 – Winston and Salem, NC city directory
1902 – 1903 – Winston and Salem, NC city directory
1904 – 1905 – Winston-Salem, NC city directory
1906 – Winston-Salem, NC city directory
1908 – Winston-Salem, NC city directory
1910 – Winston-Salem, NC city directory
1911 – Winston-Salem, NC city directory
1912 – Winston-Salem, NC city directory
1913 – Winston-Salem, NC city directory
1915 – Winston-Salem, NC city directory
1916 – Winston-Salem, NC city directory
1918 – Winston-Salem, NC city directory
1920 – Winston-Salem, NC city directory
1921 – Winston-Salem, NC city directory
1922 – Winston-Salem, NC city directory
1923 – Winston-Salem, NC city directory