Lamonts home was raided in November 2010 after his now ex-wife, Sue McGregor, told police she had found a magazine containing indecent images of children in a shoebox.
Lamont, 53 and former governor of St. Anne's Nursery School in North Kensington, created 207 images of girls as young as eight on his computer, 27 of these were classified level four, the second most serious level.
Judge Andrew Johnson sentenced the former Conservative councillor at Isleworth crown court to six months, suspended for 18 months, and fined him �20,000. Lamont was also ordered to pay �5,270 costs and forced to sign the sex offenders� register.
He went on to add "Those who make photographs of children go to prison." "There were level four photographs of children which is an extremely high level, just short of sadistic photographs of children. The public has an obvious revulsion, quite rightly, of those who use computers for their own sexual gratification by downloading such images."
"So far as the extreme pornography is concerned, given your background it�s extraordinary you have possessed these images, which are obviously revolting as well. But I have to take into account that, very unusually in this case, you suffer from a disability although it hasn�t stopped you from committing these offences. You have also contributed to society by being in employment and public service."
Lamont showed no emotion as the verdict or sentence were delivered.
Michael Magarian, defending, urged the judge to spare Lamont from a prison sentence. He said: "I suggest Mr Lamont is perhaps a bit na�ve, unworldly, but essentially he is a nice, amiable man. This is a man of impeccable character, who had Labour and Conservative politicians who have served with him queueing up to say 'this is a man of integrity.' Because of his disability, a custodial sentence may be particularly harsh and oppressive for him. It would be a thousand pities if on top of all the public stigma he has sustained, he would also be imprisoned."
Lamont resigned as councillor for Norland ward in North Kensington last year, on the eve of his first court appearance, after first being elected in 2006. He and Miss McGregor married in 1997 before divorcing last year.