Upon its release as a single,
The Arbroath Herald awarded "Glastonbury Song" a nine out of ten rating. The reviewer stated, "This is a bit of all right, with some beautiful chord sequences, reminding us a bit of
ELO. The Waterboys are best known for their twice-a-hit '
The Whole of the Moon', but this should enhance their reputation further." They also called the B-side, "Chalice Hill", a "slow-ish and pleasant" instrumental. Penny Kiley of the
Liverpool Echo commented, "The song is very Mike Scott with its meditative verse, celebratory chorus and ragbag of spiritual references. The music has enough movement to make it almost rocky but with a gentle feel." Nick Varley of
The Northern Echo described it as a "pleasant piece of folk-tinged pop which builds to a catchy climax full of big chords and haunting vocal touches". Peter Kinghorn of the
Evening Chronicle called it a "potently punchy midpacer". The
Accrington Observer gave the "typically-vibrant, passionate song" a four out of five star rating. Paul Moody of
NME was more critical of the song, calling it "not a recommendation" and stating that it is "as pompous as the title suggests", with Scott "bellowing 'I've just found God!' over the most turgid drone this side of
Marillion". He added, "Had you ever wondered what
Supertramp would sound like as raggle-taggle mystic seers, then relax, your day has come." Richard Plunkett of the Australian newspaper
The Age stated, "Scott has long been touted as one of the big hopes of rock music, and the Celtic-influenced singer-songwriter excels himself here. It takes a certain genius to make a line such as 'I just found God' work. Great stuff, and quite exceptional production." In a review of
Dream Harder, Caroline Sullivan of
The Guardian noted, "The new album is still Scott-as-hippie-gypsy. There's the epitomical 'Glastonbury Song': it may sound like glossy pop-rock, but the lyric reveals a Scott pining for simple, mud-caked values."
Stereo Review noted, "The lightness of touch, traditional instrumentation, and pantheistic-minded celebrations that have typified the Waterboys from ''Fisherman's Blues'' forward are evident in 'Glastonbury Song'."
CD Review wrote, "Scott still manages to provide some light melodic relief with 'Glastonbury Song' and 'Corn Circles,' recalling his more typical work and English roots." In a 2011 feature for
The Guardian on his love of the Waterboys, British screenwriter, producer, and film director
Richard Curtis picked "Glastonbury Song" in his Waterboys top 10 song list. He wrote, "Wonderful, energetic song about the endless search for spirituality. Sounds ghastly – is fab." In a 2017 retrospective on the "best of Mike Scott", Tom Doyle of
Q included "Glastonbury Song" as one of ten tracks on the list and described it as a "staccato groover with cryptic lyric that sparks with the joy of enlightenment". ==Track listings==