TV Series Ratings Analysis

It's Always Sunny in Philadelphia Episode Ratings Heatmap

Name: It's Always Sunny in Philadelphia
Rating: 8

2005 · 18 Seasons · 187 Episodes · Overall Score: 8.0/10 (184 rated)

Highest Rated Episode

9.4/10

S10E4: Charlie Work (28 votes)

View Episode →

Best Season

8.41/10

Season 4 holds the highest collective average score across the series.

Season 4 Details →

Most Consistent Season

Season 15

Lowest score variance (σ = 0.22), maintaining an average of 7.7.

Strongest Finale

9.2/10

Season 16 finale: "Dennis Takes a Mental Health Day"

Episode Recap →

Complete Episode Rating Matrix

Interactive score chart by season and episode number. Darker green indicates higher ratings; amber and red denote lower reception.

8.5+ (Outstanding) 7.5 – 8.4 (Great) 6.0 – 7.4 (Average) < 6.0 (Underwhelming) Few votes

Episode	Season 1	Season 2	Season 3	Season 4	Season 5	Season 6	Season 7	Season 8	Season 9	Season 10	Season 11	Season 12	Season 13	Season 14	Season 15	Season 16	Season 17	Season 18
Ep 1	7.5	8.2	8.2	8.7	8.4	7.3	8.2	8.1	8.5	8.0	8.1	7.9	6.9	7.4	8.0	8.1	6.2	7.6
Ep 2	8.1	8.7	8.7	8.9	8.9	7.6	8.4	7.7	8.2	8.4	7.0	8.8	7.9	7.2	7.5	7.8	7.0	7.8
Ep 3	8.2	8.5	8.2	8.5	8.3	8.7	7.4	7.9	8.6	7.6	7.3	8.0	6.6	7.3	7.8	7.2	6.8	7.4
Ep 4	7.8	8.6	8.5	8.4	8.6	8.2	7.6	8.7	8.0	9.4	7.2	7.6	8.5	7.2	7.9	8.3	7.1	8.0
Ep 5	7.5	8.8	7.9	8.3	8.2	8.2	7.2	8.7	7.4	7.8	8.4	7.9	8.5	7.3	7.6	7.9	8.3	8.0
Ep 6	8.1	8.2	8.2	8.0	8.2	7.8	8.4	7.7	8.0	8.2	8.0	8.4	7.8	8.3	7.4	7.9	7.3	7.5
Ep 7	8.1	7.8	7.8	8.4	8.1	8.6	8.7	8.0	8.5	7.6	8.0	8.1	7.3	7.3	7.5	8.6	8.6	6.3
Ep 8	–	7.9	8.5	8.3	8.0	7.7	8.1	8.2	8.2	8.4	8.5	7.5	6.8	8.2	7.8	9.2	8.8	–
Ep 9	–	7.9	8.5	8.2	8.4	8.7	8.3	8.7	6.8	7.9	7.6	6.9	6.8	7.5	–	–	–	–
Ep 10	–	8.4	8.6	8.3	8.9	7.8	7.5	9.1	7.6	7.5	7.8	8.2	6.8	7.8	–	–	–	–
Ep 11	–	–	8.4	7.8	8.0	8.5	8.7	–	–	–	–	–	–	–	–	–	–	–
Ep 12	–	–	8.1	8.5	8.4	8.5	7.5	–	–	–	–	–	–	–	–	–	–	–
Ep 13	–	–	8.5	9.0	–	8.3	8.0	–	–	–	–	–	–	–	–	–	–	–
Ep 14	–	–	8.5	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
Ep 15	–	–	8.8	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
Season Avg	7.9	8.3	8.4	8.4	8.4	8.2	8.0	8.3	8.0	8.1	7.8	7.9	7.4	7.6	7.7	8.1	7.5	7.5

Ratings Analysis & Trajectory

Across 18 seasons and 187 episodes, It's Always Sunny in Philadelphia has earned an overall series rating of 8.0 out of 10. The series displays remarkable consistency across its narrative arc, maintaining reliable ratings from premiere to conclusion.

The single highest-rated hour of television in the series is Season 10, Episode 4 ("Charlie Work"), rated at an extraordinary 9.4/10 with 28 ratings. Conversely, the lowest-rated installment is Season 17, Episode 1 ("The Gang F***s Up Abbott Elementary"), landing at 6.2/10.

The most precipitous single-episode shift occurred in Season 10 between Episode 4 ("Charlie Work", 9.4) and Episode 5 ("The Gang Spies Like U.S.", 7.8), a swing of 1.6 points.

Top 10 Highest Rated Episodes of It's Always Sunny in Philadelphia

Rank	Episode	Title	Score	Votes	Air Date
#1	Season 10, Ep 4	Charlie Work	9.4	28	Feb 4, 2015
#2	Season 16, Ep 8	Dennis Takes a Mental Health Day	9.2	16	Jul 19, 2023
#3	Season 8, Ep 10	Reynolds vs. Reynolds: The Cereal Defense	9.1	23	Dec 20, 2012
#4	Season 4, Ep 13	The Nightman Cometh	9.0	42	Nov 20, 2008
#5	Season 4, Ep 2	The Gang Solves the Gas Crisis	8.9	40	Sep 18, 2008
#6	Season 5, Ep 2	The Gang Hits the Road	8.9	30	Sep 24, 2009
#7	Season 5, Ep 10	The D.E.N.N.I.S. System	8.9	30	Nov 19, 2009
#8	Season 2, Ep 5	Hundred Dollar Baby	8.8	36	Jul 13, 2006
#9	Season 3, Ep 15	The Gang Dances Their Asses Off	8.8	33	Nov 15, 2007
#10	Season 12, Ep 2	The Gang Goes to a Water Park	8.8	30	Jan 11, 2017