List of first-class cricket records
Most runs in a season

Runs
Player
Season
3,816 runs (50 innings, average 90.85)
Denis Compton (Middlesex & England)
1947
3,539 runs (52 innings, average 80.43)
Bill Edrich (Middlesex & England)
1947
3,518 runs (61 innings, average 66.37)
Tom Hayward (Surrey and England)
1906
3,429 runs (56 innings, average 68.58)
Len Hutton (Yorkshire and England)
1949
3,352 runs (59 innings, average 60.94)
Frank Woolley (Kent and England)
1928
These records may never be beaten, because fewer first-class matches are played nowadays
These records may never be beaten, because fewer first-class matches are played nowadays
These records may never be beaten, because fewer first-class matches are played nowadays
Source: Wisden 2006. Last updated: 19 May 2006.
Source: Wisden 2006. Last updated: 19 May 2006.
Source: Wisden 2006. Last updated: 19 May 2006.

Question: Who holds the second place records for most runs in a season and what is the total? 
Answer: Edrich's 3,539 runs are the second highest aggregate of all time in a single season.