Bonanza Run Dates at a Glance
Bonanza aired on NBC from September 12, 1959, to January 16, 1973, spanning 14 seasons and 431 episodes in total. It began as a September premiere in 1959 and concluded in early 1973, making it one of the longest-running westerns in U.S. television history.
Overview of the Original Television Run
Bonanza premiered in the late summer of 1959 and remained on the air for more than 13 years, concluding in the winter of 1973. Its nearly 14-season run established a durable audience and consistent viewership through syndication and reruns. The show is remembered for both its sweeping storytelling and its landmark Nielsen performance during the 1960s ratings era.
Season-by-Season Timeline (1959–1973)
Below is a concise, season-level breakdown of Bonanza’s broadcast years and notable context for each period.
| Season | Season Years | Episodes | Notable Context |
|---|---|---|---|
| Season 1 | 1959–1960 | 36 | Premiered in September 1959, introducing the Cartwright family. |
| Season 2 | |||
| Season 3 | 1961–1962 | 34 | Established top 20 ratings and strong lead-in for NBC. |
| Season 4 | 1962–1963 | 34 | Continued growth in audience reach. |
| Season 5 | 1963–1964 | 34 | Peak cultural footprint during the mid-1960s. |
| Season 6 | 1964–1965 | 34 | Strong syndication planning began toward series end. |
| Season 7 | 1965–1966 | 32 | Maintained high viewership despite increased competition. |
| Season 8 | 1966–1967 | 32 | Continued critical recognition and audience loyalty. |
| Season 9 | 1967–1968 | 32 | Transition toward later 1960s production styles. |
| Season 10 | 1968–1969 | 32 | Adapted to shifting viewer preferences. |
| Season 11 | 1969–1970 | 32 | Solid performances amid evolving TV landscape. |
| Season 12 | 1970–1971 | 26 | Began syndication rebroadcasts alongside original airings. |
| Season 13 | 1971–1972 | 24 | Continued in repeats as original episodes concluded. |
| Season 14 | 1972–1973 | 24 | Final season ended January 1973; legacy persisted in syndication. |
Post-Network Run and Syndication
After its 1973 network conclusion, Bonanza entered wide syndication, airing on local stations and cable channels for decades. Its reruns sustained viewer interest and introduced the series to new audiences, reinforcing its status as a classic American western. Streaming platforms have continued this availability into the modern era, demonstrating long-term content demand.
Notable Milestones and Cultural Impact
- Premiere: September 12, 1959, on NBC.
- Series Finale: January 16, 1973, with 431 total episodes produced.
- Peak Rating: Routinely placed in the top 10 Nielsen rankings during the 1960s.
- Syndication: Became a staple of local and cable rerun schedules in the 1970s onward.
- Streaming: Available on multiple digital platforms as part of classic-TV libraries.
Why the Original Run Timeline Matters
Understanding when Bonanza was on TV helps contextualize its influence during the golden age of broadcast television. Its longevity across 14 seasons reflects stable audience engagement and strong production continuity. The post-network life of reruns and streaming further demonstrates enduring appeal and cultural resonance, making the original air dates a foundational element for assessing its legacy.
Bonanza at a Glance: Quick Reference
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Premiere Date | September 12, 1959 | Network broadcast record |
| Finale Date | January 16, 1973 | Network broadcast record |
| Total Seasons | 14 | Network archives |
| Total Episodes | 431 | Network archives |
| Network | NBC | Network archives |
Frequently Asked Questions
Here are some common questions about when Bonanza was on television and related details.
- When did Bonanza start? The series premiered on September 12, 1959.
- When did Bonanza end? The original network run concluded on January 16, 1973.
- How many seasons did Bonanza have? Bonanza aired for 14 seasons.
- How many episodes were produced? A total of 431 episodes were made.
- Is Bonanza available to stream? Yes, the series is available on several digital platforms and cable rerun channels.
Summary
Bonanza aired on NBC from September 12, 1959, through January 16, 1973, completing 14 seasons and 431 episodes. Its determined broadcast timeline established a long-lasting presence in American television, with syndication and streaming extending its reach well beyond the original run. Understanding these dates clarifies the show’s historical context and ongoing cultural relevance.