Peyton Manning had his most passing touchdowns in a season in 2013, with 55 touchdowns.

yes peyton manning holds the record for touchdowns in a season
Interpreted as:
yes Peyton Manning holds the record for passing touchdowns in a season
2013Manning2004Manning2014Manning2012Manning2010Manning2009Manning2000Manning2007Manning2006Manning2003Manning2005Manning2008Manning2002Manning2001Manning1999Manning1998Manning2015Manning554939373333333131292827272626269
NAMESEASONTMGPTDCMPATTPCTYDSAVGYDS/GTD%INTINT%SCKSCKYRATE
Peyton ManningPeyton Manning2013DENDEN165545065968.35,4778.3342.38.3101.518120115.1
Peyton ManningPeyton Manning2004INDIND164933649767.64,5579.2284.89.9102.013101121.1
Peyton ManningPeyton Manning2014DENDEN163939559766.24,7277.9295.46.5152.517118101.5
Peyton ManningPeyton Manning2012DENDEN163740058368.64,6598.0291.26.3111.921137105.8
Peyton ManningPeyton Manning2010INDIND163345067966.34,7006.9293.84.9172.5169191.9
Peyton ManningPeyton Manning2009INDIND163339357168.84,5007.9281.35.8162.8107499.9
Peyton ManningPeyton Manning2000INDIND163335757162.54,4137.7275.85.8152.62013194.7
Peyton ManningPeyton Manning2007INDIND163133751565.44,0407.8252.56.0142.72112498.0
Peyton ManningPeyton Manning2006INDIND163136255765.04,3977.9274.85.691.61486101.0
Peyton ManningPeyton Manning2003INDIND162937956667.04,2677.5266.75.1101.81810799.0
Peyton ManningPeyton Manning2005INDIND162830545367.33,7478.3234.26.2102.21781104.1
Peyton ManningPeyton Manning2008INDIND162737155566.84,0027.2250.14.9122.2148695.0
Peyton ManningPeyton Manning2002INDIND162739259166.34,2007.1262.54.6193.22314588.8
Peyton ManningPeyton Manning2001INDIND162634354762.74,1317.6258.24.8234.22923284.1
Peyton ManningPeyton Manning1999INDIND162633153362.14,1357.8258.44.9152.81411690.7
Peyton ManningPeyton Manning1998INDIND162632657556.73,7396.5233.74.5284.92210971.2
Peyton ManningPeyton Manning2015DENDEN10919833159.82,2496.8224.92.7175.1169567.9
StatMuse has season-level data for passing touchdowns going back to the 1921 season.

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