The longest existing television character would be Christine Barford from the U.K. soap Opera The Archers. The character debuted 63 years ago [as of January 01, 2017] in 1953 & has been played by three actors, currently Lesley Saweard, formally by Pamela Mant & briefly Joyce Gibbs.
Assuming you mean specifically by one actor, that would be 'Nancy Hughes' played by Helen Wagnerfor 54 years on As the World Turns until Wagner died.
If you're strictly talking about characters but not necessarily human characters, then you have to include characters like 'Big Bird' & 'Oscar the Grouch' both of whom have been voiced by Caroll Spinney since 1969, which makes (as of 08/2012) 43 years and continues to do so.
Also Kevin Clash. He's been voicing the character of 'Elmo' since 1985, 27 years and also continues to do so.
Back to humans, 'Erica Kane' was portrayed by Susan Lucci from 1971-2011, 40 years.
From Coronation Street, 'Ena Sharples' (played by Violet Carson), 'Elsie Tanner' (played by Patricia Phoenix) and 'Annie Walker' (played by Doris Speed) were all portrayed by their respective actresses for 20 years and more.
'Fraiser Crane' from Fraiser and 'Marshal Matt Dillon' from Gunsmoke played by Kelsey Grammer & James Arness respectively. They both played their characters for 20 years.
There may be more examples, but clearly the answer to the longest is (most likely) 'Nancy Hughes' from As the World Turns
William Roache has been on "Coronation Street" since 1960
According to Guinness Book of Records, Regis Philbin earned 16,746.50 on air hours as of 15 September 2011
Andy Griffin
Meet the Press has been producing episodes since 1947.
eat bulaga is the currently longest running tv show on phil tv
It didn't and won't break that record because it isn't the longest running animated TV program.Japan's Sazae-San has been on the air since 1969 and still produces episodes today.However, the longest running prime time [e.g. American] animated program before The Simpsons was The Flintstones which ran for six seasons [1960-1966], so when The Simpsons' 140th episode aired Team Homer, that was when the broke The Flintstones record.
If I can say, WWE Monday Night RAW which have been on TV for a record 923 episodes (923 weeks without a single week missed)
Tim Russert
The longest running cartoon in history is Japan's Sazae-San, it began in October 1969 & has been airing ever since.
Rapunzel is have the longest someones hair has ever been
Meet The Press has been on the air since 1947 (62 years).
Meet the Press has been producing episodes since 1947.
eat bulaga is the currently longest running tv show on phil tv
Mrmoshi is the first person to adopt his monster and has been on Moshi Monsters the longest. After all, he created Moshi Monsters.
The CBS television series M*A*S*H (1972-83) ran for 11 seasons. The longest running nonfiction television show is Meet the Press which is in its 67th year. For a fictional series, The Guiding Light was on for 57 years and The Simpsons has been on the air for 25 years.
All of a persons life
2012
gunsmoke
I doubt they were afraid of a person watching TV in the yard, although they may have been called out to check on the person's mental welfare or as a disturbance.
Blue Peter.It's also the longest running children's show in the world.