All the congressional house districts of these states:
Starting when the House had all 435 seats (1912). Let me know if I get any numbers wrong.
1912: 118/129 Democratic (91.5%)
1914: 119/129 Democratic (92.2%)
1916: 117/129 Democratic (90.7%)
1918: 116/129 Democratic (89.9%)
1920: 108/129 Democratic (83.7%)
1922: 120/129 Democratic (93.0%)
1924: 115/129 Democratic (89.1%)
1926: 117/129 Democratic (90.7%)
1928: 105/129 Democratic (81.4%)
1930: 118/129 Democratic (91.5%)
1932: 124/126 Democratic (98.4%)
1934: 123/126 Democratic (97.6%)
1936: 123/126 Democratic (97.6%)
1938: 122/126 Democratic (96.8%)
1940: 121/126 Democratic (96.0%)
1942: 121/128 Democratic (94.5%)
1944: 122/128 Democratic (95.3%)
1946: 117/128 Democratic (91.4%)
1948: 124/128 Democratic (96.9%)
1950: 122/128 Democratic (95.3%)
1952: 116/126 Democratic (92.1%)
1954: 116/126 Democratic (92.1%)
1956: 114/126 Democratic (90.5%)
1958: 116/126 Democratic (92.1%)
1960: 116/126 Democratic (92.1%)
1962: 109/124 Democratic (87.9%)
1964: 105/124 Democratic (84.7%)
1966: 95/124 Democratic (76.6%)
1968: 93/124 Democratic (75.0%)
1970: 93/124 Democratic (75.0%)
1972: 88/125 Democratic (70.4%)
1974: 96/125 Democratic (76.8%)
1976: 95/125 Democratic (76.0%)
1978: 90/125 Democratic (72.0%)
1980: 80/125 Democratic (64.0%)
1982: 95/133 Democratic (71.4%)
1984: 86/133 Democratic (64.7%)
1986: 89/133 Democratic (66.9%)
1988: 89/133 Democratic (66.9%)
1990: 89/133 Democratic (66.9%)
1992: 88/140 Democratic (62.9%)
1994: 73/140 Republican (52.1%)
1996: 82/140 Republican (58.6%)
1998: 82/140 Republican (58.6%)
2000: 83/140 Republican (59.3%)
2002: 86/145 Republican (59.3%)
2004: 92/145 Republican (63.4%)
2006: 86/145 Republican (59.3%)
2008: 82/145 Republican (56.6%)
2010: 104/145 Republican (71.7%)
2012: 110/152 Republican (72.4%)
2014: 114/152 Republican (75.0%)