REVISED: 9/13/2015
Here is a nearly complete list of 30 minute Situation Comedies (Sitcoms) that debuted in the United States between 1970 - 79. All of the most popular shows are here along with about 100 more that most have forgotten!
1. M*A*S*H (1972 - 1983)
2. Happy Days (1974 - 1984)
3. All in the Family (1971 - 1979)
* 4. The Brady Bunch (1969 - 1974)
5. Three's Company (1976 - 1984)
6. Taxi (1978 - 1983)
7. Diff'rent Strokes (1978 - 1986)
8. Mork & Mindy (1978 - 1982)
9. Sanford and Son (1972 - 1977)
10. WKRP in Cincinnati (1978 - 1982)
11. The Jeffersons (1975 - 1985)
12. Soap (1977 - 1981)
13. The Mary Tyler Moore Show (1970 - 1977)
14. The Facts of Life (1979 - 1988)
15. Laverne and Shirley (1976 - 1983)
16. Good Times (1974 - 1979)
17. Welcome Back, Kotter (1975 - 1979)
18. The Odd Couple (1970 - 1975)
19. Barney Miller (1974 - 1982)
20. The Bob Newhart Show (1972 - 1978)
21. Maude (1972 - 1978)
22. The Partridge Family (1970 - 1974)
23. Alice (1976 - 1985)
24. Benson (1979 - 1986)
25. One Day at a Time (1975 - 1984)
26. What's Happening!! (1976 - 1979)
27. Rhoda (1974 - 1978)
28. Mary Hartman, Mary Hartman (1976 - 1978)
29. Chico and the Man (1974 - 1978)
30. Archie Bunker's Place (1979 - 1983)
31. Fernwood Tonight (1977)
32. The Ropers (1979–1980)
33. Nanny and the Professor (1970–1971)
34. Quark (1977)
35. Anna and the King (1972)
36. Phyllis (1975–1977)
37. That's My Mama (1974–1975)
38. When Things Were Rotten (1975)
39. ¿QuĂ© pasa, U.S.A.? (1977–1980)
40. America 2-Night (1978)
41. Fish (1977–1978)
42. Angie (1979–1980)
43. Tabitha (1977–1978)
44. C.P.O. Sharkey (1976–1978)
45. Hot L Baltimore (1975)
46. The Bad News Bears (1979–1980)
47. Hello, Larry (1979–1980)
48. The New Dick Van Dyke Show (1971–1974)
49. Far Out Space Nuts (1975 - 1976)
50. Dusty's Trail (1973 - 1974)
51. Operation Petticoat (1977–1979)
52. The Jimmy Stewart Show (1971-1972)
53. Carter Country (1977–1979)
54. Holmes and Yo-Yo (1976–1977)
55. Paper Moon (1974–1975)
56. Bridget Loves Bernie (1972–1973)
57. All That Glitters (1977)
58. Delta House (1979)
59. Working Stiffs (1979)
60. Arnie (1970–1972)
61. The New Temperatures Rising Show (1972–1974)
62. The Tony Randall Show (1976-1978)
63. The Betty White Show (1977–1978)
64. The Girl with Something Extra (1973–1974)
65. House Calls (1979–1982)
66. Lotsa Luck (1973–1974)
67. The Paul Lynde Show (1972–1973)
68. Forever Fernwood (1977–1978)
69. The New Andy Griffith Show (1971)
70. The Sandy Duncan Show (1972)
71. Blansky's Beauties (1977)
72. The Associates (1979–1980)
73. The Tim Conway Show (1970)
74. Out of the Blue (1979)
75. Big John, Little John (1976)
76. On the Rocks (1975–1976)
77. The David Steinberg Show (1972)
78. Grady (1975–1976)
79. Ozzie's Girls (1973)
80. Me and the Chimp (1972)
81. Baby, I'm Back (1977)
82. Makin' It (1979)
83. The Sanford Arms (1977)
84. The Partners (1971–1972)
85. Paul Sand in Friends and Lovers (1974–1975)
86. Sunshine (1975)
87. Funny Face (1971)
88. The Brian Keith Show (1972–1974)
89. The Bob Crane Show (1975)
90. Make Room for Granddaddy (1970–1971)
91. Doc (1975–1976)
92. Barefoot in the Park (1970–1971)
93. The Nancy Walker Show (1976)
94. Karen (1975)
95. Detective School (1979)
96. A New Kind of Family (1979–1980)
97. All's Fair (1976–1977)
98. The Don Rickles Show (1972)
100. Busting Loose (1977)
101. Who's Watching the Kids (1978)
102. Mr. T and Tina (1976)
103. Getting Together (1971–1972)
104. Bob & Carol & Ted & Alice (1973)
105. Adam's Rib (1973)
106. Here We Go Again (1973)
107. Stockard Channing in Just Friends (1979)
108. A Touch of Grace (1973)
109. Nancy (1970–1971)
110. Roll Out (1973–1974)
111. The Ted Knight Show (1978)
112. The Texas Wheelers (1974–1975)
113. The Good Life (1971 - 1972)
114. Leo and Me (1978)
115. The Practice (1976–1977)
116. A Year at the Top (1977)
117. Fay (1975–1976)
118. On Our Own (1977–1978)
119. Good Heavens (1976)
120. Ball Four (1976)
121. The McLean Stevenson Show (1976–1977)
122. The Corner Bar (1972–1973)
123. Sugar Time! (1977–1978)
124. We'll Get By (1975)
125. The Waverly Wonders (1978)
126. The Chicago Teddy Bears (1971)
127. The Super (1972)
128. Diana (1973)
129. Turnabout (1979)
130. Co-ed Fever (1979)
131. Headmaster (1970–1971)
132. Highcliffe Manor (1979)
133. 13 Queens Boulevard (1979)
134. Szysznyk (1977–1978)
135. Joe and Sons (1975–1976)
136. The Harvey Korman Show (1977)
137. Love Thy Neighbor (1973)
138. Brothers and Sisters (1979)
139. Ivan the Terrible (1976)
140. The Kallikaks (1977)
141. Thicker Than Water (1973)
142. Apple Pie (1978)
143. Struck by Lightning (1979)
144. In the Beginning (1978)
145. A.E.S. Hudson Street (1977–1978)
146. Watch Your Mouth (1978–1979)
147. We've Got Each Other (1977–1978)
148. The Baxters (1979)
149. The Roller Girls (1978)
150. The Last Resort (1979–1980)
151. Flatbush (1979)
152. The Montefuscos (1975)
153. Big Eddie (1975)
154. Free Country (1978)
155. Billy (1979)
156. Popi (1975)
157. Hanging In (1979)
158. The Cop and the Kid (1975–1976)
159. Sirota's Court (1976–1977)
160. Needles and Pins (1973)
161. Please Stand By (1979)
162. Joe & Valerie (1978–1979)
163. Viva Valdez (1976)
164. Miss Winslow and Son (1979)
165. The Dumplings (1976)
166. Snip (1976)
167. Dorothy (1979)
168. Hizzonner (1979)
169. Another Day (1978)
170. Loves Me, Loves Me Not (1977)
171. Mr. Dugan (1979)
*
The Brady Bunch was included due to popularity and the majority of the seasons aired in the 1970s.