Let's take a look at the longest-running #1 singles on each of the COMPONENT charts of the Billboard Hot 100 (and its precedents, the Honor Roll of Hits and the Top 100). Only songs with more than 10 weeks atop will be listed here. (>15 in the case of radio songs). These are the charts that either do (or did) contribute points to the Billboard Hot 100 (or Honor Roll, or Top 100). I Know that I'm missing a few charts (especially between 1950 and 1991...) but I'm open to anyone helping me out!

STREAMING SONGS (2013-Present):

13 Weeks: Iggy Azalea - "Fancy"
13 Weeks: Miley Cyrus - "Wrecking Ball"
12 Weeks: Mark Ronson - "Uptown Funk
11 Weeks: Miley Cyrus - "We Can't Stop"

ON-DEMAND SONGS (2012-Present):

13 Weeks: Macklemore & Ryan Lewis - "Thrift Shop"
11 Weeks: Mark Ronson - "Uptown Funk"

DIGITAL TRACKS/SONGS (2003-Present):

19 Weeks: OutKast - "Hey Ya!"
13 Weeks: Flo Rida - "Low"
13 Weeks: Mark Ronson - "Uptown Funk!"
11 Weeks: Pharrell Williams - "Happy"

RADIO SONGS (1984-Present):

18 Weeks: The Goo Goo Dolls - "Iris"
16 Weeks: No Doubt - "Don't Speak"
16 Weeks: Mariah Carey - "We Belong Together"

*interestingly, neither "Don't Speak" nor "Iris" was released as a physical single.*

SINGLE SALES (1991-Present):

28 Weeks: "What Time Is It" - High School Musical 2 Cast
23 Weeks: Men In My Head - "Century Love"
21 Weeks: Men In My Head - "Survivor Tree"
17 Weeks: Bryan Adams - "I Do It For..."
16 Weeks: Tag Team - "Whoomp! (There It Is)"
16 Weeks: ADELE - "Skyfall"
14 Weeks: 'N Sync - "Girlfriend"
14 Weeks: Whitney Houston - "I Will Always Love You"
14 Weeks: Destiny' Child - "Lose My Breath"
14 Weeks: Elton John - "Something About the Way You Look Tonight/Candle in the Wind 1997"
13 Weeks: Los Del Rio - "Macarena"
12 Weeks: Boyz II Men - "End of the Road"
11 Weeks: Lady Antebellum - "Just a Kiss"
11 Weeks: Mariah Carey / Boyz II Men - "One Sweet Day"
11 Weeks: Boyz II Men - "I'll Make Love To You"
11 Weeks: Fantasia - "I Believe"
11 Weeks: Madonna - "Die Another Day"
11 Weeks: Clay Aiken - "This Is The Night/Bridge Over Troubled Water"

*Since physical single sales have become rather irrelevant since the early 2000s, artists like High School Musical Cast, ADELE, and Men In My Head have been able to take over the chart*

13 Weeks: Gordon Jenkins and The Weavers - "Goodnight Irene"
12 Weeks: Ted Weems - "Heartache"
12 Weeks: Francis Craig - "Near You"
11 Weeks: Vaughn Monroe - ""(Ghost) Riders in the Sky: A Cowboy Legend"
11 Weeks: Anton Karas - "The Third Man Theme"
11 Weeks: Jonny Ray - "Cry"
11 Weeks: Les Paul - "Vaya con Dios (May God Be with You)"
11 Weeks: Elvis Presley - "Hound Dog / Don't Be Cruel"

13 Weeks: Patti Page - "The Tennessee Waltz"
12 Weeks: Gordon Jenkins and The Weavers - "Goodnight Irene"
11 Weeks: Anton Karas - "The Third Man Theme"
11 Weeks: Elvis Presley - "Hound Dog / Don't Be Cruel"

BEST SELLING RETAIL RECORDS (1940-1945):

12 Weeks: Harry James- "I've Heard That Song Before"
12 Weeks: Mills Brothers - "Paper Doll"
12 Weeks: Artie Shaw - "Frenesi"
12 Weeks: Tommy Dorsey - ""I'll Never Smile Again"
11 Weeks: Bing Crosby - "White Christmas"

11 Weeks: Jo Stafford - "I Belong To You"

Seriously?

You must be forgetting how MASSIVE American Idol was in the first few seasons.

Seriously HSM slayed so hard with that song Went Top 10 due to physical sales alone. I mean radio wasn't playing this and its digital sales stunted early.

Milegend

I wish Adele would release "Hello" as a physical single. That alone could go Gold, which hasn't happened in ten years. Maybe she went with the physical configuration because it wasn't on any of her albums though. Still, I don't see why shipping 500k CD Singles (and maybe some cassette singles too) of Hello would harm 25 in any way, given the vast demographics who support Adele and her music.

Yes, that started off with 70,000 copies its first week out in 2007, and without any competition it held onto #1 forever. High School Musical was huge in the late 2000s. I wish I knew the title's final numbers.

I bought both of those American Idol singles (and Ruben's) when I was 10-11 lol

I mean obviously I know AI was huge as a Kelly stan, but the winning singles didn't have great longevity on the H100, so to see them snatch 11 weeks at No. 1 on a sales chart is pretty surprising. But singles sales are pretty different from any of the other components so...

Not 70k HSM was huge, lawd.

High School Musical was HUGE. For good reason.

But what about:
23 Weeks: Men In My Head - "Century Love"
21 Weeks: Men In My Head - "Survivor Tree"
?

I can't even find a Wikipedia page.

28 Weeks: "What Time Is It" - High School Musical 2 Cast

Queen High School Musical

They only release physical singles and release them in the 2010s decade. Probably isn't hard to hit #1 unless someone relevant releases (like ADELE or Mark Ronson)

Classic.

Anyone willing to delve into the rock era charts?

RADIO SONGS (1984-Present):

18 Weeks: The Goo Goo Dolls - "Iris"
16 Weeks: No Doubt - "Don't Speak"
16 Weeks: Mariah Carey - "We Belong Together"

*interestingly, neither "Don't Speak" nor "Iris" was released as a physical single.*

True, but I would actually give the record to We Belong Together, since it stayed at #1 16 weeks with the full radio panel in place. Don't Speak and Iris had long runs at #1 on HRS when it only included Top 40, Hot AC, AC, Rhythmic, and Alternative; and those songs catered to four of those five formats, making the long stays on top easier to achieve.

Also, I just posted the only nine songs to stay in the Top 40 52+ weeks on the Hot 100 thread! Uptown Funk set the record for #1s with 54 weeks (but I have my doubts it'll get any further with 25/52 in place).